A container measuring 20 cm by 15 cm by 40 cm was
15 filled with water at first. Albert poured some water into the container. In the end, the height of the water level in the container was 16 cm as shown.
- How much water did Albert pour into container? Give your answer in mℓ.
- Albert then poured all the water in the container into several identical flasks. Given that each flask can hold at least 1.8 ℓ of water, what is the least number of flasks he would need?
(a)
Height of water in the container at first
=
15 x 40
= 8 cm
Increase in the height of water in the container
= 16 - 8
= 8 cm
Volume of water poured into the container
= 20 x 15 x 8
= 2400 mℓ
(b)
Volume of the water after some water was poured in
= 20 x 15 x 16
= 4800 cm
3
1.8 ℓ = 1800 mℓ
Number of flasks
= 4800 ÷ 1800
= 2 r 1200
Least number of flasks that he would need
= 2 + 1
= 3
Answer(s): (a) 2400 mℓ; (b) 3