Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
9 min
8 min
6 min
4 min
Explanation:
Required time =$\dfrac{12×24}{12+24}$
=$\dfrac{12×24}{36}$
=$\dfrac{24}{3}$
=8 minutes.
Required time =$\dfrac{12×24}{12+24}$
=$\dfrac{12×24}{36}$
=$\dfrac{24}{3}$
=8 minutes.