An L.P.G Cylinder contains 15kg of butane gas at $27^{\large\circ}C$ and 10 atm pressure. It was leaking and its pressure fell down to 8 atm pressure after one day. Calculate the amount of leaked gas.

Question

$(a)\;1kg\qquad(b)\;2kg\qquad(c)\;3kg\qquad(d)\;4kg$