Calculate the increase in heat-dissipation rate which could be obtained from a cylinder wall by using four pin-shaped fins (fins are insulated at the ends) per square inch each having a diameter of 3/16 in. and a heigh ofn. assume that the heat transfer coefficient between the surface of the cylinder wall or a fin and the surrounding air is 25 btu/hr-ftf, the cylinder wall is at 600 °f, and the a 70 °f. the wall and the fins are made of aluminum