38 of a tank is filled with water. Another 90 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 36 cm and its breadth is 50 cm. Find the perimeter of its base.
(a)
Fraction of the tank not filled with water = 1 -
38 =
58 58 of the tank = 90 ℓ
18 of the tank = 90 ÷ 5 = 18 ℓ
88 of the tank = 18 x 8 = 144 ℓ
144 ℓ = 144000 mℓ
(b)
Length of the tank
= 144000 ÷ (36 x 50)
= 80 cm
Perimeter of the base
= (80 + 50) x 2
= 260 cm
Answer(s): (a) 144000 mℓ; (b) 260 cm