A container measuring 21 cm by 15 cm by 42 cm was
13 filled with water at first. Jeremy 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 Jeremy pour into container? Give your answer in mℓ.
- Jeremy then poured all the water in the container into several identical pitchers. Given that each pitcher can hold at least 1.1 ℓ of water, what is the least number of pitchers he would need?
(a)
Height of water in the container at first
=
13 x 42
= 14 cm
Increase in the height of water in the container
= 20 - 14
= 6 cm
Volume of water poured into the container
= 21 x 15 x 6
= 1890 mℓ
(b)
Volume of the water after some water was poured in
= 21 x 15 x 20
= 6300 cm
3
1.1 ℓ = 1100 mℓ
Number of pitchers
= 6300 ÷ 1100
= 5 r 800
Least number of pitchers that he would need
= 5 + 1
= 6
Answer(s): (a) 1890 mℓ; (b) 6