A man can row upstream at 10 kmph and downstream at 18 kmph. Find the man's rate in still water? · ABC26GN3834
Subject: General Aptitude · Chapter: Boats and Streams · Exam: Indian Railways Gr. ‘D’ Exam 2014
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
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.
Study loop for Boats and Streams
· Browse this chapter in the app