35 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 30 cm and its breadth is 50 cm. Find the perimeter of its base.
(a)
Fraction of the tank not filled with water = 1 -
35 =
25 25 of the tank = 120 ℓ
15 of the tank = 120 ÷ 2 = 60 ℓ
55 of the tank = 60 x 5 = 300 ℓ
300 ℓ = 300000 mℓ
(b)
Length of the tank
= 300000 ÷ (30 x 50)
= 200 cm
Perimeter of the base
= (200 + 50) x 2
= 500 cm
Answer(s): (a) 300000 mℓ; (b) 500 cm