an aircraft flying at an average speed of 770km/h takes 15 hours to complete a journey. find the time taken by the aircraft to complete the same journey if its average speed is 660 km/h.
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Answer:peed =
770 km/h
Complete journey=15 hours
Distance=Speed×time
=15×770
=11550 km
So now speed=600km/h
Distance=11550 km
Time=Distance/speed
Time=11550/600
=19.25
Since0.25=1/4th
It is 1/4th of an hour
Means=1/4×60
=15 minutes
So time taken=19 hours 15 minutes
Hope it helps you
Thanks
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