A container measuring 21 cm by 15 cm by 48 cm was
13 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 24 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 1.2 ℓ of water, what is the least number of flasks he would need?
(a)
Height of water in the container at first
=
13 x 48
= 16 cm
Increase in the height of water in the container
= 24 - 16
= 8 cm
Volume of water poured into the container
= 21 x 15 x 8
= 2520 mℓ
(b)
Volume of the water after some water was poured in
= 21 x 15 x 24
= 7560 cm
3
1.2 ℓ = 1200 mℓ
Number of flasks
= 7560 ÷ 1200
= 6 r 360
Least number of flasks that he would need
= 6 + 1
= 7
Answer(s): (a) 2520 mℓ; (b) 7