A) 3.5 km
B) 4.5 km
C) 5.5 km
D) 6.5 km
Correct Answer: D
Solution :
Let he walked up the hill at a distance of x km. By given condition, \[\frac{x}{25}+\frac{x}{3.25}=4\frac{36}{60}\] \[\Rightarrow \] \[x\left( \frac{1}{25}+\frac{1}{3.25} \right)=\frac{276}{60}\] \[\Rightarrow \] \[x\left( \frac{2}{5}+\frac{4}{13} \right)=\frac{276}{60}\] \[\Rightarrow \] \[x=\frac{276}{60}\times \frac{65}{46}=6.5\,km\]You need to login to perform this action.
You will be redirected in
3 sec