need help in this question pls
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(a). CSA of cylinder = 402.12cm²
2πrh = 402.12
2×22/7×r×20 = 402.12
r = 402.12×7/2×22×20
r = 201.6×7/22×20
r = 1411.2/440
r = 14112/4400
r = 3.2cm approx
(b). TSA of cylinder = 2πr(r+h)
=2×3.14×3.2(3.2+20)
= 6.28×3.2(23.2)
= 20.096× 23.2
= 466.2272cm²
Hence, the
r = 3.2cm
TSA of cylinder = 466.2272cm²
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