Ajoba and Prav drive to work. Ajoba drives 45 miles in 2.5 hours. Prav drives 74 km in 1 hour 15 min. Work out the difference between their

Question

Ajoba and Prav drive to work. Ajoba drives 45 miles in 2.5 hours. Prav drives 74 km in 1 hour 15 min. Work out the difference between their average speeds in km/h. 1 mile = 1.6 km

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Diễm Thu 4 years 2021-07-14T05:19:59+00:00 1 Answers 160 views 0

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  1. niczorrrr
    -1
    2021-07-14T05:21:50+00:00
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    Explanation:

    We have,

    Ajoba and Prav drive to work. Ajoba drives 45 miles in 2.5 hours. Prav drives 74 km in 1 hour 15 min.

    1 mile = 1.6 km

    45 miles = 72.42 km

    74 miles = 119.0 km

    1 hour 15 min means 1.25 hours

    Average speed of Ajoba is :

    v_1=\dfrac{72.42 }{2.5}=28.96\ km/h

    Average speed of Prav,

    v_2=\dfrac{119}{1.25}=95.2\ km/h

    Difference in average speed of Ajoba and Prav is :

    v=v_2-v_1\\\\v=v_2-v_1\\\\v=95.2-28.96\\\\v=66.24\ km/h

    So, the difference in average speed of Ajoba and Prav is 66.24 km/h.

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