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If a man rows at the rate of 5 kmph in still water and his rate against the current is 3.5 kmph. then the man's rate along the current is__________?

Correct answer: C. 6.5 kmph

  • A. 4.25 kmph
  • B. 6 kmph
  • C. 6.5 kmph
  • D. 8.5 kmph

Explanation

The current speed is the difference between still-water speed and upstream speed: 5 km/h - 3.5 km/h = 1.5 km/h. Therefore, the downstream speed is 5 km/h + 1.5 km/h = 6.5 km/h. The likely mistake is choosing 8.5 kmph by adding the still-water and upstream rates directly.

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