As solid cylinder has a total surface area of 462 square cm. Its curved surface area is one- third of its total surface area. find the volume of the cylinder.
Answers
Answered by
1
Answer:
Given, total surface area of cylinder = 462 square cm.
Also, CSA of cylinder =
3
TSA of cylinder
⇒TSA=2πrh+2πr
2
⇒TSA=CSA+2πr
2
⇒TSA=
3
TSA
+2πr
2
⇒
3
2TSA
=2πr
2
⇒
3
TSA
=πr
2
⇒
3
462
=
7
22
×r
2
⇒r=7cm
Now, CSA of cylinder =
3
TSA of cylinder
=
3
462
=154cm
2
⇒2πrh=154
⇒2×
7
22
×7×h=154
⇒h=
2
7
cm
Therefore, volume of the cylinder =πr
2
h
=
7
22
×7
2
×
2
7
=539cm
3
Hence, volume of the solid cylinder is 539cm
3
.
Answered by
0
Answer:
3.5 cm and 7 cm
Step-by-step explanation:
hope its correct thank you
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