Total time taken by a person in going to a place by walking and returning on cycle is 5 h 45 min. He would have gained 2 h by cycling both ways. The time taken by him to walk both ways, is ?

• A. 6 h 45 min
• B. 7 h 45 min
• C. 8 h 15 min
• D. 8 h 30 min