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22 March, 20:54

A van moves 50 miles with a constant speed of 20 mph and another 84 miles with a constant speed of 56 mph. How much time in total does it take to travel these distances?

A) 1 hour

B) 4 hours

C) 1.5 hours

D) 2.5 hours

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  1. 22 March, 22:52
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    B) 4 hours

    Explanation:

    the equation relating speed, distance and time is as follows

    speed = distance / time taken

    the van moves 50 miles at 20 mph and the next 84 miles at 56 mph

    so lets calculate the time taken at both speeds

    substituting the values in the above equation

    20 mph = 50 miles / time

    time taken = 50 / 20 = 2.5 hours

    56 mph = 84 miles / time

    time taken = 1.5 hours

    the totat time taken is - 2.5 + 1.5 = 4 hours
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