a car covers 90km in 1 + 1\2=2+1\2=3\2 its velocity in km/h. with mathematical method
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Distance travelled by the car = 90 km
Time taken to travel = 3/2 seconds
Velocity of the car in km/h = Distance travelled by the car in km ÷ Time taken to travel that distance in seconds = 90 ÷ 3/2 = 90 × 2/3 = 60
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