The speed of a moving sidewalk at an airport is 7 ​ft/sec. A person can walk 74 ft forward on the moving sidewalk in the same time it takes

Question

The speed of a moving sidewalk at an airport is 7 ​ft/sec. A person can walk 74 ft forward on the moving sidewalk in the same time it takes to walk 15 ft on a non moving sidewalk in the opposite direction. At what rate would a person walk on a non moving​ sidewalk

in progress 0
bonexptip 3 years 2021-09-02T04:05:55+00:00 1 Answers 0 views 0

Answers ( )

  1. thongdat2
    0
    2021-09-02T04:07:03+00:00
    Reply

    Answer:

    10.56 ft/s.

    Explanation:

    given,

    Speed of side walk = 7 ft/s

    time taken to travel 74 ft on the moving sidewalk = time taken to walk 15 ft on non moving side walk.

    We know,

    time = \dfrac{distance}{speed}

    \dfrac{74}{w+7}=\dfrac{15}{w-7}

    59 w = 7\times 74 + 15\times 7

    59 w = 623

    w = 10.56\ ft/s

    Rate at which person walk on non moving side walk is equal to 10.56 ft/s.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )