A container measuring 25 cm by 22 cm by 40 cm was
14 filled with water at first. Zeph poured some water into the container. In the end, the height of the water level in the container was 19 cm as shown.
- How much water did Zeph pour into container? Give your answer in mℓ.
- Zeph then poured all the water in the container into several identical flasks. Given that each flask can hold at least 1.2 ℓ of water, what is the least number of flasks he would need?
(a)
Height of water in the container at first
=
14 x 40
= 10 cm
Increase in the height of water in the container
= 19 - 10
= 9 cm
Volume of water poured into the container
= 25 x 22 x 9
= 4950 mℓ
(b)
Volume of the water after some water was poured in
= 25 x 22 x 19
= 10450 cm
3
1.2 ℓ = 1200 mℓ
Number of flasks
= 10450 ÷ 1200
= 8 r 850
Least number of flasks that he would need
= 8 + 1
= 9
Answer(s): (a) 4950 mℓ; (b) 9