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26 September, 04:03

a rectangular feild is 16metre long and 10 metre wide. there is a uniform width all around it having an area of 120metre square

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  1. 26 September, 06:29
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    2 metre

    Step-by-step explanation:

    let the width around the field be x metre

    then (16+2x) (10+2x) - 16*10=120

    160+32x+20x+4x²-160=120

    4x²+52x-120=0

    or x²+13x-30=0

    x²+15x-2x-30=0

    x (x+15) - 2 (x+15) = 0

    (x+15) (x-2) = 0

    either x+15=0,

    x=-15 (Rejected being negative)

    or x-2=0

    x=2 metre
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