Amit start from a point A and walks to another point B and then return from B to A by his car and thus takes a total time of 6 h 45 min. If he had driven both ways in his car, he would have taken 2 h less. How long would it take for him to walk both ways ?

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