EAMCET Engineering 2007 Solved Paper

Two cylinders A and B fitted with pistons, contain equal number of moles of an ideal monoatomic gas at 400K. The piston of A is free to move while that of B is held fixed. Same amount of heat energy is given to the gas in each cylinder. If the rise in temperature of the gas in A is 42K, the rise in temperature of the gas in B is (γ=5∕3)