how long will a boy take to run round a square field of side 50 meters , if he runs at the rate of 10 km / hr ?
"speed = 10 km / hr = 10 * 5 / 18 = 25 / 9 m / sec distance = 50 * 4 = 200 m time taken = 200 * 9 / 25 = 72 sec answer is c"
divide(multiply(50, const_4), multiply(10, divide(const_1000, const_3600)))