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

1. (a)6 hours 45 minutes
2. (b)7 hours 45 minutes
3. (c)8 hours 15 minutes
4. (d)8 hours 30 minutes