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28 November, 01:05

A car travels 50 km in 25 km / h and then travels 60km with a velocity 20 km/h and then travels 60km with a velocity 20 km/h in the same direction. Find the velocity

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  1. 28 November, 01:11
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    v = 21.25 km/h

    The average velocity is 21.25km/h

    Explanation:

    Average velocity = total displacement/time taken

    v = d/t

    Given;

    A car travels 50 km in 25 km / h

    d1 = 50km

    v1 = 25km/h

    time taken = distance/velocity

    t1 = d1/v1

    t1 = 50/25 = 2 hours

    and then travels 60km with a velocity 20 km/h

    d2 = 60km

    v2 = 20km/h

    t2 = d2/v2 = 60/20

    t2 = 3 hours

    and then travels 60km with a velocity 20 km/h in the same direction

    d3 = 60km

    v3 = 20km/h

    t3 = d3/v3 = 60/20

    t3 = 3 hours

    Average velocity = total displacement/total time taken

    v = (d1+d2+d3) / (t1+t2+t3)

    v = (50+60+60) / (2+3+3)

    v = 170/8

    v = 21.25 km/h

    The average velocity is 21.25km/h
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