how long will a boy take to run round a square field of side 55 meters , if he runs at the rate of 9 km / hr ?
"speed = 9 km / hr = 9 * 5 / 18 = 5 / 2 m / sec distance = 55 * 4 = 220 m time taken = 220 * 2 / 5 = 88 sec answer is a"
divide(multiply(55, const_4), multiply(9, divide(const_1000, const_3600)))