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Question

A bus covers first 120 km in 2 hours, next 150 km in 3 hours and the last 60 km in 1 hour. Find the average speed of the bus.

A
60 km/hr
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B
55 km/hr
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C
50 km/hr
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D
45 km/hr
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Solution

The correct option is B 55 km/hr

Average speed = Total distanceTotal time taken

Now, total distance travelled
= 120 + 150 + 60 km = 330 km

and total time taken = 2 + 3 + 1 hours

= 6 hours

Average speed of train = 3306

= 55 km/hr


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