A boat goes 12 km in 1 h in still water. It takes thrice time in covering the same distance against the current. Find the speed of the current. |
A) 8 km/h
B) 12 km/h
C) 6 km/h
D) 7 km/h
Correct Answer: A
Solution :
Speed of a boat in still water |
\[=\frac{\text{Distance}}{\text{Time }}=\frac{12}{1}=12\,\,\text{km/h}\] |
Speed against the current \[=\frac{12}{3}=4\,\,km/h\] |
Let the speed of the current \[=x\,\,km/h\] |
According to the question, |
\[12-x=4\] |
\[\Rightarrow \] \[x=8\,\,km/h\] |
You need to login to perform this action.
You will be redirected in
3 sec