ANSWERS PLEASEEEE Three runners are jogging from North Augusta to Beech Island. Runner 1 runs 14 miles in 3 hours while Ru

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ANSWERS PLEASEEEE

Three runners are jogging from North Augusta to Beech Island. Runner 1 runs 14 miles in 3 hours while Runner 2 runs 16 miles in 4 hours. Runner 3 runs 15 miles in 6 hours. What is the average speed of each runner? Then, get the average speed of all the runners together (total distance/total time)

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Diễm Thu 3 years 2021-07-18T18:16:23+00:00 1 Answers 3 views 0

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    2021-07-18T18:17:37+00:00

    Explanation:

    Given that,

    Runner 1 runs 14 miles in 3 hours. His average speed is given by :

    v_1=\dfrac{14\ miles}{3\ h}=4.67\ mph

    Runner 2 runs 16 miles in 4 hours. His average speed is given by :

    v_2=\dfrac{16\ miles}{4\ h}=4\ mph

    Runner 3 runs 15 miles in 6 hours. His average speed is given by :

    v_3=\dfrac{15\ miles}{6\ h}=2.5\ mph

    Total distance covered by all three runners, D = 14 + 16 +15 = 45 miles  

    Total time taken, t = 3 + 4 + 6 = 13 hours

    The average speed of all the runners together  is given by :

    V=\dfrac{45\ miles}{13\ h}\\\\V=3.46\ mph

    Hence, this is the required solution.        

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