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

• A. hrs 45 min
• B. hrs 15 min
• C. hrs 30 min
• D. hrs 45 min