Answers

2016-02-25T22:36:04+05:30
R = 21 cm
h = 5 m = 500 cm

CSA of one pillar = 2πrh
∴ CSA of 4 pillars = 4*2πrh
= 8πrh
= 8*22*21*500/7
= 264000 cm²
= 26.4 m²
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