Question

A car takes 2 hours to reach a destination by travelling at the speed of 60 km/h. How long will it take when the car travels at the speed of 80 km/h?​

Answer 1

acceleration=10km/hr

using its equation of motion

then using 2nd equation of motion find s =140km

so your answer is 140 km

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Answer 2

Speed (in Km):-  60 - 80

Time (in hr):-  2 - y2

x1 y1 = x2 y2

60 X 2 = 80 Xy2

Y2 = 60 x 2/80 = 3/2

Hence, the required time = 3/2 hours