Question $1$

A flat belt is required to transmit $25kW$ from a $300-mm$ diameter pulley running at $1500rpm$ to a

$400-mm$ diameter pulley. The coefficient of friction can be taken as $0\mathrm{.}72,$ the belt's density is $1100$

$k\frac{g}{m}3,$ and the maximum permissible stress is $7\mathrm{.}5$MPa. The distance between the centers is $2m,$

and the proposed belt is $4$ mm thick.

$1\mathrm{.}1$ Calculate the width required for the belt.