Question

A water tank is 1/4 full. 180 litres of water is poured into it and it becomes 7/10 full. What is the maximum amount the tank can hold?

Answer 1

Answer

400l

Step-by-step explanation:

let the maximum amount that can be hold by the tank be x

then.......

1/4x + 180 = 7/10x

1/4x - 7/10x = -180

(5x - 14x)/20 = -180

-9x = -180*20

x = -180*20/-9

x = 20*20 =400

x = 400 litres

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