Spring force is proportional to stretch distance, F=kd. Work done while stretching a spring is proportional to the force times the distance. How do you expect the work to compare if you stretch twice as far? same
double
four times

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.