Aman takes 4 hours 30 minutes in walking to a certain place and riding back He would have gained 2 h...........

Quantitative Aptitude (CDS) Time & distance

Aman takes 4 hours 30 minutes in walking to a certain place and riding back. He would have gained 2 hours by riding both ways. The time he would take to walk both ways, is?

6 hours

6 hours 30 minutes

7 hours 15 minutes

8 hours

Explanation:

Let the distance be x km. Then,
(Time taken to walk x km) + (Time taken to ride x km) = 9/2 hours
(Time taken to walk 2x km) + (Time taken to ride 2x km) = 9/2×2
= 9 hours
But time taken to ride 2x km = 5/2 Hours
Time taken to walk 2x km = [9 - (5/2)] hours
= 13/2 hours
= 6 hours 30 minutes