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Verified answer
R= 9 cmt= 20 cm
Ditanya= LS? Dan LP?
LS= 2πrt
LS= 2 x 3,14 x 9 x 20
LS= 6,28 x 9 x 20
LS= 6,28 x 180
LS= 1130,4 cm²
LP= 2πr (r+t)
LP= 2 x 3,14 x 9 (9+20)
LP= 6,28 x 9 (29)
LP= 56,52 (29)
LP= 1639,08 cm²
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