Question

Sael roti is stacked one above the other to form a cylindrical

stack. Find the curved surface of one cylindrical stack of 21

rotis, if the radius of each roti is 3.5cm and thickness is 1.5cm.
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Answer 1

Step-by-step explanation:

Csa of cylindrical stack of 21 roti=2πrh

CSA=2X22/7X3.5X1.5=33cm^2

CSA of 21 stacked cylinder =33cm^2

So, CSA of 1 stacked cylinder=33cm^2/21