A bus travels 90km per hour it takes two hours and another 90km/hour and require a time period of 3 hours . Calculate the average speed of bus
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Answer:
Avg. speed is 90 km/h
Explanation:
1st find distance in both case (D = S × T)
(i) S = 90km/h T = 2 hrs
=》D = 90 × 2 =》180km
(ii) S = 90km/h T = 3 hrs
=》D = 90 × 3 =》270km
Avg. speed = total Distance/ total time
Avg. speed = 180+270/2+3
Avg. speed = 450/5
.: Avg. speed of bus is 90 km/hr
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