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34. A cylinder is closed at both the ends by 28 cm high cones. The radius and height
of the cylinder are 21 cm and 50 cm respectively. Find the total surface area of this
object.
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Answer:
Surface area of cone, πr(r+
h
2
+r
2
)=5541.77cm
2
, where r=28cm,h=21cm
Surface area of hemisphere, 2πr
2
=4926.015, where r=28cm
Curve Surface area of cylinder, 2πrh=9583.28cm
2
Total = 20049cm
2
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