Question

a drum of oil is 3/4 filled,when 15 litre of oil is drawn from it 7/12 filled what is the capacity of drum

Answer 1

Let Capacity of Drum = X litres.

Initially, Drum was 3X/4 part filled.

15 litres oil drawn then it become, 7X/12 part.

Now, according to question,

3X/4 - 7X/12 = 15

(9X - 7X)/12 = 15

2X = 180

X = 90 litres.