The speed of a boat in upstream is 35 km/hr and the speed of current is 3.5 k/hr. The time taken by boat to cover a distance of 294 km downstream is:

7 hrs

Speed of boat in upstream = 35 km/hr

Speed of current = 3.5 km/hr

Speed of boat in still water = (35 + 3.5) km/hr

Speed of boat in downstream = (35  + 3.5) + 3.5 = 42 km/hr

Time to cover the distance in downstream = \(\frac{294}{42}\) = 7 hours