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439.82 (square units)

The formula is SA = 2 (pi x r2) + (2 pi x r x h)
which can also be expressed as
SA = 2 pi (r2 + rh)

Here = 2 pi [(52)+ (5 x 9)] = 2 pi [70] = 140 pi or about 439.82

Take the formula for the circumference of a circle (2πr) and multiply by the height.

(2*π*5)*9=282.86

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