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Q.
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.
15 minutes
B.
20 minutes
C.
18 minutes
D.
22 minutes
View Answer
Correct choice: B
Explanation:
Let the total distance to be covered is 84 kms. Time taken to cover the distance without stoppage = 84/42 hrs = 2 hrs Time taken to cover the distance with stoppage = 84/28 = 3 hrs. Thus, he takes 60 minutes to cover the same distance with stoppage. Therefore, in 1 hour he stops for 20 minutes.
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