A container measuring 27 cm by 21 cm by 55 cm was
15 filled with water at first. Fred 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 Fred pour into container? Give your answer in mℓ.
- Fred 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
=
15 x 55
= 11 cm
Increase in the height of water in the container
= 20 - 11
= 9 cm
Volume of water poured into the container
= 27 x 21 x 9
= 5103 mℓ
(b)
Volume of the water after some water was poured in
= 27 x 21 x 20
= 11340 cm
3
1.2 ℓ = 1200 mℓ
Number of flasks
= 11340 ÷ 1200
= 9 r 540
Least number of flasks that he would need
= 9 + 1
= 10
Answer(s): (a) 5103 mℓ; (b) 10