A container measuring 24 cm by 21 cm by 51 cm was
13 filled with water at first. Justin poured some water into the container. In the end, the height of the water level in the container was 20 cm as shown.
- How much water did Justin pour into container? Give your answer in mℓ.
- Justin then poured all the water in the container into several identical flasks. Given that each flask can hold at least 1.6 ℓ of water, what is the least number of flasks he would need?
(a)
Height of water in the container at first
=
13 x 51
= 17 cm
Increase in the height of water in the container
= 20 - 17
= 3 cm
Volume of water poured into the container
= 24 x 21 x 3
= 1512 mℓ
(b)
Volume of the water after some water was poured in
= 24 x 21 x 20
= 10080 cm
3
1.6 ℓ = 1600 mℓ
Number of flasks
= 10080 ÷ 1600
= 6 r 480
Least number of flasks that he would need
= 6 + 1
= 7
Answer(s): (a) 1512 mℓ; (b) 7