A man rows upstream 36 km and downstream 48 km taking 6 hours each time. The speed of the current is
Solution
Ratio of distance = 36 : 48 = 3 : 4
Ratio of velocity = 3 : 4
$\therefore$ speed of current $= \dfrac{4 - 3}{2} = \dfrac{1}{2}$
$\therefore 3 \times 6 = 18 \rightarrow 2 \times = 36$
$\therefore$