aeroplane flies 200 km with a uniform speed of 300 km per hour at and then another kilometre with a uniform speed of 240 km per hour calculate the average speed of the aeroplane
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Explanation:
total distance=200+200=400 km
time taken for first 200 km=200/300=2/3 hr
time taken for second 200 km=200/240=5/6 hr
total time=2/3+5/6=9/6=3/2=1.5 hr
average speed=total distance/total time
=400/1.5
=800/3=266.67kmph
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