A container measuring 20 cm by 12 cm by 40 cm was
14 filled with water at first. Japheth 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 Japheth pour into container? Give your answer in mℓ.
- Japheth then poured all the water in the container into several identical flasks. Given that each flask can hold at least 1.7 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
= 20 x 12 x 9
= 2160 mℓ
(b)
Volume of the water after some water was poured in
= 20 x 12 x 19
= 4560 cm
3
1.7 ℓ = 1700 mℓ
Number of flasks
= 4560 ÷ 1700
= 2 r 1160
Least number of flasks that he would need
= 2 + 1
= 3
Answer(s): (a) 2160 mℓ; (b) 3