Renu can row a boat upstream at 12 km/hr and downstream at 20 km/hr, then the speed of the current is
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 4 km/hr
Let the speed of the boat in still water be b and the speed of the current be c:
\( \displaystyle b+c=20 \)
\( \displaystyle b-c=12 \)
Subtracting:
\( \displaystyle 2c=8 \)
\( \displaystyle c=4\text{ km/hr} \)
CBSE Applied Mathematics (Class XII):
Boats and Streams
