Without any stoppages a person travels a certain distance at an average speed of 40 km/hr and with stoppages he covers the same distance at an average of 20 km/hr. How many minutes per hour does he stop?
Choose the correct choice from the following answers.
A) 15 minute
B) 20 minutes
C) 30 minutes
D) 45 minutes
E) None of these
Explanation :   In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km   so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30   minutes   Answer – 30 minutes
<result>C</result>
Without any stoppages a person travels a certain distance at an average speed of 40 km/hr and with stoppages he covers the same distance at an average of 20 km/hr. How many minutes per hour does he stop?