**1. Mathematics Textbook 1B**

(b) Attempt Exercise 9.2 Q1 to Q10.

*Enter your answers to Exercise 9.2 under Comments. Label your Answers with Question numbers.*

**2. ACELearning Portal: eLearning Portal**

> Additional Arithmetic

>

**Ratio, Rate and Speed: Choose Rate**

(a) Go through video lessons: Rate, Average Rate, Example 1, Example 2

(b) Try Practice Drills on your own to check your understanding

Note: An email has been sent to all students via the AceLearning

1.

ReplyDelete(a)$3.50/l

(b)72vases/day

(c)47words/min

(d)$80/m^2

(e)4kg/m

(f)60g/egg

2.

(a)$23/hour

(b)$920/week

3.

(a)9km/litre

(b)$1.20/litre

4.

(a)87.5g/cube

(b)o.7g/cm^3

5.

(a)$15/ticket

(b)$150 for 10 tickets

6.

(a)$22.50/m^2

(b)$450 for 20m^2

7.

(a)27litres/min

(b)50 hours

8.

(a)$26/kg

(b)25g/m^2

(c)Mass= 3kg Cost= $78

9.

(a)$201600

(b)$4200/m^2

10.

(a)19.3g/cm^3

(b)No it is not. Pure Gold would have a rate of 19.3g/cm^3. However, this cube only have a rate of 15g/cm^3 which means that it is not purely made of gold.

1a) $3.50/l

ReplyDeleteb) 72 vases/day

c) 47 words/min

d) $80/m^2

e) 4 kg/m

f) 60 g/egg

2a) $23/hour

b) $920/week

3a) 9km/litre

b) $1.20/litre

4a) 87.5g/cube

b) 0.7g/cm^3

5a) $15/ticket

b) $150/10 tickets

6a) $22.50/m^2

b) $450/20m^2

7a) 27 litres/minutes

b) 3 minutes

8a) $26/kg

b) 25g/1m^2

c) Mass = 3 kg; Cost = $78

9a) $201 600

b) $4200/m^2

10a) 19.3g/cm^3

b) No, this gold cube is not made of pure gold. Pure gold has a rate of

19.3g/cm^3, but this gold cube has a rate of 15g/cm^3, thus it is

not made of pure gold.

1.

ReplyDeletea) $3.50/litre

b) 72 vases/day

c) 47 words/min

d) $80/m2

e) 4 kg/m

f) 60 g/egg

2.

a) $23/hour

b) $920/week

3.

a) 9km/litre

b) $1.20/litre

4.

a) 87.5g/cube

b) 0.7g/cm3

5.

a) $15/ticket

b) $150

6.

a) $22.50/m2

b) $450

7.

27 litres/minute

3 minutes

8.

a) $26/kg

b) 25g/vm2

c) Mass - 3 kg ; Cost - $78

9.

a) $201 600

b) $4200/m2

10.

a) 19.3g/cm3

The rate of pure gold is supposed to be 19.3g/cm3. However, this cube only has a rate of 15g/cm3 , which means that it is not made of pure gold.

1.

ReplyDelete(a) $3.50/l

(b) 72 vases/day

(c) 47 words/min

(d) $80/m^2

(e) 4 kg/m

(f) 60 g/egg

2.

(a) $23/h

(b) $920/week

3.

(a) 9 km/l

(b) $1.20/l

4.

(a) 87.5 g/cube

(b) 0.7 g/cm^3

5.

(a) $15/ticket

(b) $150

6.

(a) $22.50/m^2

(b) $450

7.

(a) 27 l/min

(b) 3 min

8.

(a) $26/kg

(b) 25 g/m^2

(c) Mass: 3kg Cost: $78

9.

(a) $201600

(b) $4200/m^2

10.

(a) 19.3 g/cm^3

(b) No. The density of the other gold cube is 15 g/cm^3, while the density of the pure gold cube is 19.3 g/cm^3. So the density of the other gold cube is lesser than that of the pure gold cube. The density of a pure gold cube would not change, so the other gold cube is not made of pure gold.

1.

ReplyDeletea) $3.50/ℓ

b) 72 vases/day

c) 47 words/min

d) $80/m^2

e) 4 kg/m

f) 60 g/egg

2.

a) $23/hr

b) $920/wk

3.

a) 9km/ℓ

b) $1.20/ℓ

4.

a) 87.5g/cube

b) 0.7g/cm^3

5.

a) $15/ticket

b) $150

6.

a) $22.50/m^2

b) $450

7.

a) 27 ℓ/minute

b) 3 minutes

8.

a) $26/kg

b) 25g/vm2

c) Mass: 3 kg

Cost: $78

9.

a) $201600

b) $4200/m^2

10.

a) 19.3g/cm^3

b) The rate of the other gold cube, which is 15g/cm^3, is lighter than the rate of the cube made of pure gold, which is 19.3g/cm^3. Hence, as it is not the same, the other gold cube is not made of pure gold.

This comment has been removed by the author.

ReplyDelete1.

ReplyDelete(a) $3.50/L

(b) 72 vases/day

(c) 47 words/min

(d) $80/m^2

(e) 4kg/m

(f) 60 g/egg

2.

(a) $23/h

(b) $920/week

3.

(a) 9 km/L

(b) $1.20/L

4.

(a) 87.5 g/cube

(b) 0.7 g/cm^3

5.

(a) $15/ticket

(b) $150

6.

(a) $22.50/m^2

(b) $450

7.

(a) 27 L/min

(b) 3 mins

8.

(a) $26/kg

(b) 25g

(c) Mass of fertiliser: 3kg; Cost of fertiliser= $78

9.

(a) $201 600

(b) $4200/m^2

10.

(a) 19.3g/cm^3

(b) No it is not. (3cm)^3 =27cm^3. (2cm)^3= 8cm^3. As 27cm^3 of pure gold is 521.1g, 8cm^3 of pure gold must be 154.4g. But as the 2cm cube of gold weighed 120g, some of its components was not made of gold as it was lighter than the density of pure gold and therefore, it is not made of pure gold.

1.

ReplyDeletea) $3.5/ℓ

b) 72 vases/day

c) 47 word/min

d) $80/m^2

e) 4kg/m

f) 60g/egg

2.

a) $23/h

b) $920/week

3.

a) 9km/ℓ

b) $1.20/ℓ

4.

a) 87.5g/cube

b) 0.7g/cm^2

5.

a) $15/ticket

b) $150

6.

a) $22.50/m^2

b) $450

7.

a) 27ℓ/min

b) 3min

8.

a) $26/kg

b) 25g/m^2

c) Mass= 3kg

Cost= $78

10.

a) 19.3g/cm^3

b) No,it is not made of pure gold. Its mass, 120g, is lesser than the mass of a pure gold cube of the same size (side 2cm), which is 2^3*19.3 = 154.4g.

1.

ReplyDelete(a)$3.50/l

(b)72 vases a day

(c)47 words/minute

(d)$80/m^2

(e)4kg/m

(f)60 g/egg

2.

(a)$23/h

(b)$920/week

3.

(a)9km per litre

(b)$1.20/litre

4.

(a)87.5g per cube

(b)0.7g/cm^3

5.

(a)$15 per ticket

(b)$150

6.

(a)$22.50/m^2

(b)$450

7.

(a)27 liters per min

(b)3 minutes

8.

(a)$26/kg

(b)25 g

(c)3 kg and $78

9.

(a)$201 600

(b)$4200 per m^2

10.

(a)19.3g/cm^3

(b)The gold cube is not pure gold.The mass of pure gold per cm^3 is 19.3. But this gold cube has only a cm^3 of 15cm^3 .Hence the gold cube is not pure gold.

1.

ReplyDelete(a) $3.50/l

(b) 72 vase/day

(c) 47 words/min

(d) $80/m^2

(e) 4kg/m

(f) 60g/egg

2.

(a) $23/h

(b) $920/week

3.

(a) 9km/l

(b) $1.20/l

4.

(a) 87.5g/cube

(b) 0.7g/cm^3

5.

(a) $15/ticket

(b) $150/10 tickets

6.

(a) $22.50/m^2

(b) $450/20m^2

7.

(a) 27l/min

(b) 3 min

8.

(a) $26/kg

(b) Mass: 3kg Cost: $78/3kg

9.

(a) $201 600

(b) $4200

10.

(a) 19.3g

(b) 2cm x 2cm x 2cm = 8cm^3 120g/8cm^3 = 15g/cm^3

The mass of pure gold per cm^3 is 19.3g. Whereas, this gold cube has a mass of 15g per cm^3. Thus the gold cube is not made of pure gold.

1a. $3.20 /litre

ReplyDelete1b. 72 vases /day

1c. 47 words /min

1d. $80 /metre^2

1e. 4kg /metre

1f. 60g /egg

2a. $23 /h

2b. $920 /week

3a. 9km /litre

3b. One litre of petrol is $1.20.

4a. 87.5g /cube

4b. 0.7g /cm^3

5a. $15 /ticket

5b. $150

6a. $22.50 /m^2

6b. The price is $450.

7a. 27 litres /minute

7b. 3 minutes is needed.

8a. $26 /kg

8b. 25g /m^2

8c. The mass of the fertiliser would be 3kg and the cost of it would be $78.

9a. $201600

9b. $4200 /metre^2

10a. 19.3g /cm^3

10b. No it is not, Its rate of mass (g) per volume (cm^3) is different from the actual pure gold cube.

Q1.

ReplyDelete(a) $3.50/l

(b) 72 vase/day

(c) 47 words/min

(d) $80/m^2

(e) 4kg/m

(f) 60g/egg

Q2.

(a) $23/h

(b) $920/week

Q3.

(a) 9km/l

(b) $1.20/l

Q4.

(a) 87.5g/cube

(b) 0.7g/cm^3

Q5.

(a) $15/ticket

(b) $150 for 10 tickets

Q6.

(a) $22.50/m^2

(b) $450/20m^2

Q7.

(a) 27 litres/min

(b) 3 min

Q8.

(a) $26/kg

(b) Mass: 3kg Cost: $78/3kg

Q9.

(a) $201 600

(b) $4200/metre^2

Q10.

(a) 19.3g

(b) No it is not.The original pure gold cube had a rate of 19.3g/cm^3 which is different than the other gold cube.

1)

ReplyDeletea) $3.50/l

b) 72 vases/day

c) 47 words/min

d) $80/m^2

e) 4kg/m

f) 60g/egg

2)

a) $23/h

b) $920/week

3)

a) 9km/h

b) $1.50/l

4)

a) 87.5g/cube

b) 0.7g/cm^3

5)

a) $15/ticket

b) $150

6)

a) $22.50/m^2

b) $450

7)

a) 27l/min

b) 3 min

8)

a) $26/kg

b) 25g/m^2

c) Mass: 3 kg Cost:$78

9)

a) $201,600

b) $4200/m^2

10)

a) 19.3g

b) No. The pure gold cube has a rate of 19.3g/cm^3. However, the gold cube only has a rate of 15g/cm^3, which is different from the pure gold cube's rate.

1a) $3.50/ L

ReplyDeleteb) 72 vases/ day

c) 47 words/ min

d) $80/ m^2

e) 4kg/ m

f) 60g/ egg

2a) $23/ h

b) $920/ week

3a) 9km/ h

b) $1.20/ l

4a) 87.5g/ cube

b) 0.7g/ cm^3

5a) $15/ ticket

b) $150

6a) $22.50/ m^2

b) $450

7a) 27L/ min

b) 3 min

8a) $26/ kg

b) 25g/ m^2

c) Mass:3 kg

Cost:$78

9a) $201,600

b) $4200/ m^2

10a) 19.3g

b) No, the pure gold cube has a rate of 19.3g/ cm^3. Whereas, the gold cube has a rate of 15g/ cm^3, making the gold cube's rate and the pure gold cube's rate different.

1a) $3.50/ L

ReplyDeleteb) 72 vases/ day

c) 47 words/ min

d) $80/ m^2

e) 4kg/ m

f) 60g/ egg

2a) $23/ h

b) $920/ week

3a) 9km/ hour

b) $1.20/ litre

4a) 87.5g/ cube

b) 0.7g/ cm^3

5a) $15/ ticket

b) $150

6a) $22.50/ m^2

b) $450

7a) 27L/ min

b) 3 minutes

8a) $26/ kg

b) 25g/ m^2

c) Mass:3 kg

Cost:$78

9a) $201 600

b) $4200/ m^2

10a) 19.3g

b) No, the rate of the weight of the pure gold cube is 19.3g/ cm^3. However, the rate of the weight of the gold cube is 15g/ cm^3. The rate of the weight of the pure gold and gold cube are different, therefore the gold cube is not made of pure gold.

1)

ReplyDeletea:$3.50/l b:72vases/day c:47words/min d:$80/m^3 e:4kg/m f:60g/egg

2)

a: $23/hour b: $920/week

3)

a: 9km /litre

b: $1.20/litre of petrol

4)

a: 87.5g/cube

b: 42.5g/cube

5)

a: $15/ticket

b: $150

6)

a: $22.50/m^2

b: $450

7)

a: 27 l/min

b: 3min

8)

a: $0.026/kg

b: 25g

c: mass = 120m^2 , cost = $78

9)

a: $201600

b: $4200/m^2

10)

a: 19.3g/cm^3

b: no it contains only 15g/cm^3 which is less weight than pure gold so something must have mixed in with it

1.

ReplyDelete(a) $3.50/L

(b) 72 vases/day

(c) 47 words/min

(d) $80/m^2

(e) 4 kg/m

(f) 60 g/egg

2.

(a) $23/hour

(b) $920/week

3.

(a) 9km/L

(b) $1.20/L

4.

(a) 87.5g/cube

(b) 0.7g/cm^3

5.

(a) $15/ticket

(b) $150

6.

(a) $22.50/m^2

(b) $450

7.

(a) 27L/min

(b) 3min

8.

(a) $26/kg

(b) 25g

(c) Mass: 3kg, Cost: $78

9.

(a) $201600

(b) $4200/m^2

10.

(a) 19.3g/cm^3

(b) No, it is not. Pure gold would have a rate of 19.3g/cm^3 but this gold cube has a rate of 15g/cm^3. So it is not made of pure gold.