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arithmetic

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The base of a solid right prism is a triangle whose sides are 9cm,12cm and 15 cm.the total surface area of the prism.

  • arithmetic -

    not enough information, you didn't give the height of the prism.
    Since the base is a right-angled triange, (9^2 + 12^2= 15^2),
    the area of the base is (1/2)(9)(12) = 54 cm^2
    Once you know the height h, the total surface area would be
    2(54) + 9h + 12h + 15h

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