how long will a boy take to run round a square field of side 60 meters , if he runs at the rate of 9 km / hr ?
"speed = 9 km / hr = 9 * 5 / 18 = 5 / 2 m / sec distance = 60 * 4 = 240 m time taken = 240 * 2 / 5 = 96 sec answer is a"
divide(multiply(60, const_4), multiply(9, divide(const_1000, const_3600)))