Down stream speed of boat is 14 km/h. Upstream speed of boat is 10 km/h. In how much time can it cover 72 km in still water?

8 hours 6 hours 4 hours 12 hours

6 hours

We know that, Time = \(\frac{Distance}{Speed}\) Speed of the boat in still water = (Downstream speed of boat + Upstream speed of boat) $\div$ 2 = Speed of the boat in still water = \(\frac{14 + 10}{2}\)= 12 km/h = Time = \(\frac{72}{12}\) = 6 hours