ABC26GN3834 · Boats and Streams

Subject: General Aptitude · Chapter: Boats and Streams · Exam: 2014 · Marks: · Difficulty:

A man can row upstream at 10 kmph and downstream at 18 kmph. Find the man's rate in still water?

(a)14 kmph

(b)4 kmph

(c)12 kmph

(d)10 kmph

Answer

Answer (as printed): A

Explanation

Speed of boatman in still water $$\begin{aligned} & =\frac{1}{2}(\text { Rate downstream }+ \text { Rate upstream }) \\ & =\frac{1}{2}(18+10)=\frac{28}{2}=14 \mathrm{kmph} \end{aligned}$$

Explanation as extracted from the printed page; notation may be imperfect.

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