38 of a tank is filled with water. Another 120 litres of water are needed to fill the tank to its brim.
- What is the volume of the tank in mℓ?
- The height of the tank is 40 cm and its breadth is 60 cm. Find the perimeter of its base.
(a)
Fraction of the tank not filled with water = 1 -
38 =
58 58 of the tank = 120 ℓ
18 of the tank = 120 ÷ 5 = 24 ℓ
88 of the tank = 24 x 8 = 192 ℓ
192 ℓ = 192000 mℓ
(b)
Length of the tank
= 192000 ÷ (40 x 60)
= 80 cm
Perimeter of the base
= (80 + 60) x 2
= 280 cm
Answer(s): (a) 192000 mℓ; (b) 280 cm