The lateral surface area of a cylinder is 94.2 cm² and its height is 5 cm .[Take π = 3.14]
Find :
(i) the radius of its base
(ii) its volume
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Answer:
LSA=94.2 cm
2
For cylinder =
LSA=2nrh
∴2πr(5)=94.2
2×3.14×r×5=94.2
31.4×r=94.2
r=3 cm
∴ radius of base =3 cm
Volume of cylinder =πr
2
h
=3.14×(3)
2
×5
=3.14×9×5
=3.14×45
=141.3 cm
3
∴ Volume of cylinder =141.3 cm
2
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