a car covers a certain distance in 2hr at 60km/h if it moves at 80km/h it will take ____ hour
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Let the car takes x hours to reach a destination by travelling at the speed of 80 km/h. Then,
Speed (in km/hr) 60 80
Time (in hours) 2 x
Clearly, more the speed, less will be the time taken. So, it is a case of inverse proportion.
∴60×2=80×x⇒x=
80
60×2/80
=3/2
Hence, the time taken will be 3/2 hours
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