SSC CHSL 2024 · PYQ · Speed, Distance and Time · medium
A boat can travel 60 km downstream in 4 hours. If the speed of the boat in still water is 13 km/h, then in what time will it cover 30 km upstream?
Answer
The correct answer is B: 3 4/7 hours. Downstream speed = 60/4 = 15 km/h. Stream speed = 15 – 13 = 2 km/h.
- A.3 5/7 hours
- B.3 4/7 hours✓ Correct
- C.2 8/11 hours
- D.2 4/7 hours
Downstream speed = 60/4 = 15 km/h. Stream speed = 15 – 13 = 2 km/h. Upstream speed = 13 – 2 = 11 km/h. Time = 30/11 = 2 8/11 hours. The answer is (d) 2 8/11 hours.
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