A person takes 20 minutes more to cover a certain distance by decreasing his speed by 20%. What is the time taken to cover the distance at his original speed?
A.1 hour 30 minutes
B.1 hour 15 minutes
C.1 hour 20 minutes
D.2 hours
Answer:C
A person takes 20 minutes more to cover a certain distance by decreasing his speed by 20%. What is the time taken to cover the distance at his original speed?
A.1 hour 30 minutes B.1 hour 15 minutes C.1 hour 20 minutes D.2 hours