a river 2 m deep and 45 m wide is flowing at the rate of 3 kmph the amount of water that runs into the sea per minute is ?
"( 3000 * 2 * 5 ) / 60 = 4500 m 3 answer : a"
divide(multiply(multiply(2, 45), multiply(3, const_1000)), multiply(const_1, const_60))