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If the sum of the radius of two circles is 7 cm and the difference of their circumferences is 8 cm, thei
circumferences will

By Lyla

If the sum of the radius of two circles is 7 cm and the difference of their circumferences is 8 cm, thei
circumferences will be:
(a) 28cm and 18cm
(b) 20cm and 12 cm
तितमे कोई नहीं/None of these​

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Lyla

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A can do a piece of work in 9 days, B is 50% more efficient than A . In how many days the same piece of work can be done if they w

1 thought on “If the sum of the radius of two circles is 7 cm and the difference of their circumferences is 8 cm, thei<br />circumferences will”

  1. let the radius of one be x

    and another 7-x. ( as thier sum)

    now thier circumference

    1st = 2πr= 2*22/7*x = 44x/7

    2nd = 2πr= 2*22/7*(7-x)= 44*(7-x)/7= 308-44x/7

    accordingly,

    1st-2nd=8

    (44x/7)-(308-44x/7)= 8

    44x-308+44x/7=8

    88x-308=56

    88x=56+308

    x=56+308/88

    x= 4.1

    I think none of these is correct

    Reply

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