a train running at the speed of 72 km / hr crosses a pole in 8 seconds . find the length of the train .
"explanation : speed = 72 * ( 5 / 18 ) m / sec = 20 m / sec length of train ( distance ) = speed * time = 20 * 8 = 160 meter option c"
multiply(divide(multiply(72, const_1000), const_3600), 8)