An open belt 100 mm wide connects two pulleys mounted on parallel shafts with their centres 2.4 m apart. the diameter of the larger pulley is 450 mm and that of the smaller pulley 300 mm. the coeffi- cient of friction between the belt and the pulley is 0.3 and the maximum stress in the belt is limited to 14 n/mm width. if the larger pulley rotates at 120 r. p.m., find the maximum power that can be transmitted

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.