A river has a width of 23m. A row boat has a velocity of 4m/s on still water. The river flows with a velocity of 6m/s. Calculate

Question

A river has a width of 23m. A row boat has a velocity of
4m/s on still water. The river flows with a velocity of 6m/s.
Calculate the time taken for the boat to cross the river.

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Hồng Cúc 4 months 2021-07-17T09:28:21+00:00 2 Answers 4 views 0

Answers ( )

    0
    2021-07-17T09:29:27+00:00

    Answer:

    t = 5.75 sec.

    Explanation:

    A river has a width of 23m. A row boat has a velocity of  4m/s on still water.

    The river flows with a velocity of 6m/s.

    find:

    Calculate the time taken for the boat to cross the river.

                            a             b

    ========================================

                            |            /              

                            |         /               Vr = 6m/s

                            |      /                       23m

                            |   /

                         boat    v = 4m/s

    ========================================

    vertical motion:

    X = V.t

    where X is the width of the river = 23m

    V is the speed of the boat with respect to river = 4m/s

    t is the time trip it takes.

    plug in values into the formula:

    23m = 4 m/s * t

    t = 5.75 sec.

    therefore, the time it takes for the boat to cross the river is 5.75 seconds

    0
    2021-07-17T09:30:19+00:00

    Answer:

    t = 5.75 sec.

    Explanation:

    X = V * t

    23m = 4 m/s * t

    t = 5.75 sec.

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