Question

A drum of petrol is 3/4 full.When 30 litres of oil are drawn from it it is 7/12 full.Find the capacity of drum

Answer 1

Let Capacity of Drum = X litres.

Initially, Drum was 3X/4 part filled.

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

Now, according to question,

3X/4 - 7X/12 = 30

(9X - 7X)/12 = 30

2X = 360

X = 180 litres.


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Thank you.

Answer 2

let the total capacity be X litres.
Therefore Initial capacity is 0.75X
Therefore 3/4 X - 7/12 X = 30
2X/12=30
Therefore 2X= 360
Therefore X= 180
Capacity of the tank is 180 litres.