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A flat belt drive is required to transmit 10 kW from a motor running at 1000rpm. The belt is 15 mm thick and has a mass density of 0.001 gm/mm3.  Permissible tensile stress for the belt material is 2.5 N/mm2. Diameter of the driving pulley is 250 mm, whereas the speed of the driven pulley is 367 rpm.  Driving and driven shafts are 1.25m apart.  The coefficient of friction between belt and pulley may be taken as 0.25.  Determine the width of the belt for safe working.

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