An LPG cylinder contain 15kg of butane gas at $27^{\large\circ}C$ and 10 bar pressure. The cylinder linked and it was found that after 4 days , the mass of the gas left in cylinder was only 10 kg. How much drop in pressure was occured in each day?

Question

$(a)\;0.52 bar\qquad(b)\;0.833bar\qquad(c)\;1.6 bar\qquad(d)\;1.832bar$