A car travels 30 km at uniform speed of 40 km /h and the next 30 km at uniform speed of 20 km/h. Find its average speed?
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i hope that answer will help yoiu
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Tanya2207:
it is not correct answet
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Answer:
first we find the time.
So first the car has travelled 30km with speed 40 km/h
So time=distance/speed
time=30/40
=3/4 s
Second the car travelled 30 km with speed 20km/h
time=30/20
=3/2 s
total distance =60km
we know that
average speed=total distance /total time taken
So average speed=60/3/4+3/2
=26.67km/h
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