a car takes 20 hour to cover a certain distance at a speed of 80 km per hour find time taken if its speed is increased by 10 kilometre per hour
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Answer:
Speed of car is 80 Km/h.
Time taken by car is 20 hour.
Distance=speed × time
Distance=80×20
=1600 Km
Now speed is increased by 10 Km/h
New speed = 80+10
= 90 Km/h
New Time = distance ÷ speed
1600÷90
=160÷9
=17.7 Hour
Ans. 17.7 hour
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