The capacities of three water tanks are in the ratio 4 : 5 : 9. The smallest of them can hold 2160 litres.
How much can the biggest one hold?
4860 litres
Let the capacities be 4x , 5x and 9x respectively
Given that : 4x = 2160
⇒ x = 21604 = 540
∴ 9x = 9 × 540 = 4860 litres
The biggest one can hold 4860 litres of water.