Without any stoppage, a person travels a certain distance at an average speed of 42 km/h, and with stoppages he covers the same distance at an average speed of 28 km/h. How many minutes per hour does he stop?
A. 20 minutes
B. 22 minutes
C. 18 minutes
D. 15 minutes
Answer:A
Without any stoppage, a person travels a certain distance at an average speed of 42 km/h, and with stoppages he covers the same distance at an average speed of 28 km/h. How many minutes per hour does he stop?
A. 20 minutes B. 22 minutes C. 18 minutes D. 15 minutes