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13 March, 21:06

The paper cup is 9 cm tall and the circular opening has a radius of 2.5 cm.

What is the minimum amount of paper needed to make the paper cup to the nearest whole cm² assuming no overlap in the paper?

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  1. 13 March, 22:16
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    181cm^2

    Step-by-step explanation:

    The minimum amount of paper needed to make the cup to the nearest whole number will be = to the surface area of the cylinder = A=2πrh+2πr2.

    Where π = 22/7, r = 2.5cm, h = 9cm

    A = 2*22/7*2.5*9+2*22/7*2.5*2.5

    A = 141.428+39.285

    A = 180.713

    A = 181cm^2
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