Question

a bus travel 45 km at a uni gf orm speed of 60 km per hour and next cover a distance of 30 km at a speed of 40km per hour calculated the average speed of the bus
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Answer 1

average speed =total displacement / total time

total displacement = 45+30=75

time = displacement /velocity.

total time= 45/60 +30/40.

substitute values in above formula; than you will get,

average speed is 50 km/hr