SSC MTS 2021 · PYQ · Speed, Distance and Time · medium
The speed of a boat in still water is 10 km/h. The speed of the stream is 2 km/h. What is the total distance that the boat will travel if it is rowed for 4 hours upstream and 3 hours downstream?
A.72 km
B.70 km
C.64 km
D.68 km✓ Correct
Explanation
Upstream speed = 10–2 = 8 km/h, downstream speed = 10+2 = 12 km/h. Distance upstream = 8×4 = 32 km. Distance downstream = 12×3 = 36 km. Total = 68 km.
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