25 of a tank is filled with water. Another 84 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 50 cm. Find the perimeter of its base.
(a)
Fraction of the tank not filled with water = 1 -
25 =
35 35 of the tank = 84 ℓ
15 of the tank = 84 ÷ 3 = 28 ℓ
55 of the tank = 28 x 5 = 140 ℓ
140 ℓ = 140000 mℓ
(b)
Length of the tank
= 140000 ÷ (40 x 50)
= 70 cm
Perimeter of the base
= (70 + 50) x 2
= 240 cm
Answer(s): (a) 140000 mℓ; (b) 240 cm