Find the speed of the boat in still water, if a boat moves downstream at the rate of $16 \text{ km/hr}$ and upstream at the rate of $10 \text{ km/hr}$.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $13 \text{ km/hr}$
Speed downstream $= 16 \text{ km/hr}$,
Speed upstream $= 10 \text{ km/hr}$
$\text{Speed of the boat in still water} = \frac{1}{2} (16 + 10) \text{ km/hr}$
$= \frac{1}{2} (26) \text{ km/hr} = 13 \text{ km/hr}$