Question

1/3 of a drum is filled with water. If need another 60 litre water to be filled whole drum, then what is the capacity of drum?​

Answer 1

1/3 of drum is filled with water, so 2/3 part required to fill drum, as 1/3+2/3 = 1

So, 2/3 part of drum is 60 litre

1/3 part of drum is 30 litre

Therefore capacity of drum is 60+30= 90 litre