Question

priya takes 3 hrs 30 minutes in walking a distance and riding back to same place whare she started she could walk both ways in 4 hrs 10 minutes. the time taken by her to ride back both ways is

Answer 1

Ride + walk = 3hrs 30 mins
Walk + walk = 4 hrs 10 mins 
2* walk = 4 hrs 10 mins [Assumption: speed on an average is constant through out her walk for the same distance]
walk = 2 hrs 5 mins

Ride + walk = 3 hrs 30 mins
Ride + 2 hrs 5 mins = 3 hrs 30 mins
Ride = 1 hr 25 mins

Hence, Ride + Ride = 1 hr 25 mins + 1 hr 25 mins = 2 hrs 50 mins.
Hence time taken by her to ride back both ways = 2 hrs 50 mins.
Hope it helps.