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Given,
Height= 8cm
Diameter =21cm
Radius = 21/2cm
= 10.5 cm
C.S.A.=2πrh
=( 2× 22× 21 × 8 ) / 7×2
= 7,392 /14
= 528 sq.cm
T.S.A.= 2πr (h + r)
= 2×π×r ( 8+10.5 ) cm
= 2 × 22/7 × 21/2 × 18.5
= 17,094 / 14
= 1221 sq.cm
Volume = πr2h
= 22/7 × (10.5)2 × 8
= 19,404 / 56
= 346.5 cu.cm
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