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20-05-2017
Mathematics

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Hey (; can somebody please help me with this answer ...

Hey can somebody please help me with this answer class=

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20-05-2017

Answer B
Pi times r times l + pi times r squared

Find l by doing Pythagorean 20^2+21^2= 841 the sq rt of 841 is =29
Pi (20)(29)= 580 pi. + 20^2 pi = 400 pi.
Answer. 980 pi

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