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a closed tin is in the shape of acylinder of diameter 10cm and height 15cm.use the value 3.14 for pie to find a)the total surface area of the tin b)the value of the tin to the nearest naira if tin plate cost 450 per m2

  • math -

    pi, not pie!

    2pi(r^2+rh) = 2pi(25+75) = 200pi

    Now just multiply that are by the cost, which is .0450/cm^2

  • math -

    2*3.14*5 (5 plus 15)
    31.4 (20)
    628cm^20th total surface area

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