Josna takes 4 hrs 30 min in walking a distance and riding back to some place where she started. She could walk both ways in 5 hrs 40 min. The time taken by her to ride back both ways is

• A. 3 hr 20 min
• B. 3 hr 35 min
• C. 3 hr 45 min
• D. 3 hr 15 min