Discussion of Question with ID = 082 under Distance-and-Time

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A city bus has an average speed of 19 km/h if it doesn't stop anywhere. But if it stops in-between the average speed drops to 17 km/h. How many minutes does it stop in 1 hour?


$6{6/19}$ mins.


$7{13/18}$ mins.


$4{17/21}$ mins.


$8{3/7}$ mins.

Ans: a

Due to stoppages, it covers a less distance of 19 - 17 = 2 in one hour. The time taken for that distance would be the wastage due to stopping = $2/19$ × 60 = $6{6/19}$ mins.

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