The figure, not drawn to scale, is made of two connected cubical containers, V and W. Container V is sealed at the top and completely filled to the brim. Container W is
23 filled with 156960 mℓ of water. The height of the water level in Container W is 3 cm higher than that in Container V. Height of Container W is 69 cm. Water is then drained from the container and the height of the water level from the base falls to 31 cm.
- What is the capacity of Container W in litres?
- What is the volume of water in the container now in litres?
(a)
23 of Container W = 156960 mℓ
13 of Container W = 156960 ÷ 2 = 78480 mℓ
33 of Container W = 78480 x 3 = 235440 mℓ
1 ℓ = 1000 mℓ
Capacity of Container W = 235440 mℓ = 235.44 ℓ
(b)
Fraction of Container W not filled
= 1 -
23 =
13 Height of Container W not filled
=
13 x 69 cm
= 23 cm
Height of Container V
= 69 - 23 - 3
= 43 cm
Volume of remaining water in Container V
= 43 x 43 x 31
= 57319 cm
3 Volume of remaining water in Container W
= 69 x 69 x 31
= 147591 cm
3 Total volume of remaining water in the container
= 57319 + 147591
= 204910 cm
3
1 ℓ = 1000 cm
3 204910 cm
3 = 204.91 ℓ
Answer(s): (a) 235.44 ℓ; (b) 204.91 ℓ