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  9. Q161

APSC CCE 2022 · Question 161 of 176

The speed of a boat in still water is 10 m/s and the speed of the stream is 6 m/s. If the boat is moving upstream and again downstream, what is the ratio of the time taken to cover a particular stretch of distance in each direction?

Basic Numeracy

  1. A2:1
  2. B3:1
  3. C4:1Correct
  4. D6:1

Answer: C. 4:1

Explanation

Upstream speed = 10−6 = 4 m/s and downstream speed = 10+6 = 16 m/s; for the same distance, time ratio = 16:4 = 4:1.

Source: APSC CCE Prelims 2022 GS Paper-II, official Series-D key

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