A drum of kerosene is $$\frac{3}{4}$$ full. When 30 litres of kerosene is drawn from it, it remains $$\frac{1}{2}$$Â full. The capacity of the drum is
Drum is $$\frac{3}{4}$$ full.
When 30 liters are drawn out of it, it becomes $$\frac{1}{2}$$ full.
Therefore $$\frac{3}{4}$$ - $$\frac{1}{2}$$ of drum = 30
                    $$\frac{1}{4}$$ of drum = 30
                      Total capacity of drum = 30 $$\times$$ 4 = 120 litres
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