A person has to make a Journey of 72 Kms. He rides a cycle at d12km. Per hour. After going a certain distance, the cycle is punctured punctured and he walks the remaining distance at 4 1/2 km. Per hour. Find

2 hr. and 24 kms

1 hr and 12 kms

2 1/2 hrs. and 30 kms

4 1/2 hrs. and 54 kms