A man covers a certain distance upto the post office with the speed of 4 km/hr and returns back with the speed of 3 km/hr. If he covered the total distance in 3 1/2 hr, what was the total distance he
A man covers a certain distance upto the post office with the speed of 4 km/hr and returns back with the speed of 3 km/hr. If he covered the total distance in 3 1/2 hr, what was the total distance he