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irinina [24]
3 years ago
10

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

Mathematics
1 answer:
inysia [295]3 years ago
3 0
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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