A container measuring 21 cm by 18 cm by 48 cm was
14 filled with water at first. Bobby poured some water into the container. In the end, the height of the water level in the container was 15 cm as shown.
- How much water did Bobby pour into container? Give your answer in mℓ.
- Bobby then poured all the water in the container into several identical jugs. Given that each jug can hold at least 1.4 ℓ of water, what is the least number of jugs he would need?
(a)
Height of water in the container at first
=
14 x 48
= 12 cm
Increase in the height of water in the container
= 15 - 12
= 3 cm
Volume of water poured into the container
= 21 x 18 x 3
= 1134 mℓ
(b)
Volume of the water after some water was poured in
= 21 x 18 x 15
= 5670 cm
3
1.4 ℓ = 1400 mℓ
Number of jugs
= 5670 ÷ 1400
= 4 r 70
Least number of jugs that he would need
= 4 + 1
= 5
Answer(s): (a) 1134 mℓ; (b) 5