29. If the lateral surface area of a cylinder is 94.2cmand its height is 5cm, then find:
i) radius of its base.
ii) its volume (Use it = 3.14).
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Answer:
radius = 3cm & volume= 141.3 cm³
Step-by-step explanation:
LSA=94.2 cm²
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 =πr²h
=3.14×(3)²×5
=3.14×9×5
=3.14×45
=141.3 cm³
∴ Volume of cylinder =141.3 cm³
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