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10 February, 13:09

The surface area of a cone is approximated by the polynomial 3.14r squared + 3.14rl where r is the radius and l is the slant height. find the approximate surface area of a cone when l=5cm and r=3cm

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  1. 10 February, 14:16
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    The approximate surface area

    = 3.14 (3) + 3.14 (3) (5)

    = 3.14 (18)

    = 56.52 cm^2
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