a man walking at a rate of 15 km / hr crosses a bridge in 15 minutes . the length of the bridge is ?
"speed = 15 * 5 / 18 = 15 / 18 m / sec distance covered in 15 minutes = 15 / 18 * 15 * 60 = 750 m answer is d"
multiply(divide(multiply(15, const_1000), const_60), 15)