Question

Two cylinders of same radil 14cm and heights 20cm & 25cm are placed
one upon other. Then find TSA of shape formed.
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Answer 1

Answer:

Letting the cylinders to be hollow.

Now the newly made cylinder has:

radius(r) = 14 cm and height(h) = 20+25=45cm.

now total surface area of newly formed hollow cylinder= 2πrh cm²

=88×45= 3960cm²

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