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30 June, 15:58

A can of cashews is cylindrical in shape. The can has a height of 4.5 inches. The radius is 1.5 inches. Find the surface area of the cashew can. Use 3.14 to approximate pi. Round your answer to the nearest hundredth.

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  1. 30 June, 16:20
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    First you will need to split the object into three 2D figures, two circles and a rectangle. Then you will calculate the area of each of these and add them all together.

    Circles:

    a = πr^2

    a = π (1.5) ^2

    a = 7.065

    Then find the area of the rectangle.

    a = lw where l is length and w is width.

    since this is a cylinder, the circumference of the top will be the length.

    c = 2 πr

    c = 2 π (1.5)

    c = 9.42

    a = lw

    a = 9.42 x 4.5

    a = 42.39

    Now add everything up and remember that there are two circles, at the top AND bottom.

    7.065 (2) + 42.39 = 56.52

    The answer is 56.53 inches.
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