Q16.if the lateral surface area of a cylinder is 94.2 cm² and it's height is 5 cm, then find: (I) radius of it's base (ii) it's volume (use π=3.14)
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Answer:
I) 3cm & II) 141.3cm³.
Step-by-step explanation:
Given - 1) Lateral surface area of cylinder=94.2cm²
2) And it's height=5 cm
To find-: 1) Radius of its base.
2) It's volume.
I) Radius of its base =>
Let radius of cylinder= r cm
Height= h= 5 ( given)
Now it's given Lateral surface area=94.2 cm²
=> 2πrh =94.2
=> 2*3.14*r*5=94.2
=>r = 94.2/2*3.14*5
=> r=3 cm
ii) It's volume
We know that,
r= 3 cm & h= 5 cm
volume of cylinder=πr²h
= 3.14*3*3*5
= 141.3cm³
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