Please solve it and explin also, no link please.

P(area of cuboid, which already includes area of base of cylinder R which needs to be subtracted) + Q(total curved area of cylinder including the base area of cylinder which since, already included in P so needs to be subtracted) - 2R(Area of base of cylinder as explained in previos two steps)= P+Q-2R ie option d). (Note in my earlier reply suggesting P+ Q-R was not correct, so please ignore my earlier reply)