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The radii of two cylinders 3:2 and height 7:4.find the ratios of their curved surface area.

  • Math - ,

    a = 2pi*r*h
    a' = 2pi(2/3 r)(4/7 h) = 2pi*rh*8/21

    a:a' = 1:8/21 = 21:8

    Note that the ratio is just the product of the linear ratios.

  • Math - ,

    Thank you

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