Question

Find the distance covered by the boat upstream if it travels for 2 hours. Speed of the stream is 7km/hr and that of boat is 57 km/hr?

• A. 128 km
• B. 100 km
• C. 110 km
• D. 120 km

Answer 1

Answer:

B. 100 km

Speed of Stream $S_s=7km/hr$

Speed of Boat $B_s=57km/hr$

Upstream Speed $U_s=B_s-S_s=57-7$

$=50km/hr$

Distance Covered by the Boat Upstream$=\frac{U_s}{Time}$

$=\frac{50}{2}$

$=100 km$