Question

The rates upstream and downstream of a swimmer are 10 kmph and 13 kmph respectively. The speed of current is?

• A. 3 kmph
• B. 1.5 kmph
• C. 11.5 kmph
• D. None of these

Answer 1

Answer:

B. 1.5 kmph

Upstream Speed,$U_s = 10 kmph$

Downstream Speed,$D_s = 13 kmph$

$$Speed of Stream ,$S_s=\frac{(D_s)-(U_s)}{2}$

$=\frac{(13-10)}{2}$

$=\frac{3}{2}$

$=1.5kmph$