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? asked in Science & MathematicsMathematics · 1 month ago

Please help with algebra question, urgent ?

This is all the information that I have been given. 

Update:

rotchm - “The width of the above regatta lake consists of nine 13.5 metre lanes. Each of the sloped lanes measures 7 metres.

Determine the width of the lake floor.

Attachment image

2 Answers

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  • Ian H
    Lv 7
    1 month ago

    The diagram is supposed to be symmetric with the 5 m depth line a distance d from the top left or right vertices. d^2 + 5^2 = 7^2, so d = √(24)

    Lake floor width is 13.5 - 2√(24). You finish that.

  • rotchm
    Lv 7
    1 month ago

    It is hard to read your writing. Write on the figure the corresponding values given. The "5m" is already there. 

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