Acompressor requiring 89.5 kw, is to run at about 250 rpm. the drive is by v-belts from an electric motor running at 750 rpm. the diameter of the pulley on the compressor shaft must not be greater than 1 m while the centre distance between the pulleys is limited to 1.75 m. the belt speed should not exceed 1600 m/min. determine the number of v-belts required to transmit the power if each belt has a cross sectional area of 3.75 cm' and weighs 0.00981 n/cm and has an allowable tensile stress of 245.2 n/cm. the groove angle of the pulley is 35'. the co-efficient of friction between the belt and the pulley is 0.25. calculate also the length required of each belt.