Question

a solid cylinder of radius r and height h is placed over other cylinder of the same height and radius . the total surface area of the shape so formed is?​

Answer 1

Answer:

A solid cylinder of radius r and height h is placed over other cylinder of same height and radius. The total surface area of the shape so formed is 4πrh + 4πr2 .

Step-by-step explanation:

Hope it helps

Answer 2

when two cylinders of same height and radius are kept one above other ...

they act as 1 cylinder .... whose radius remains the same but height doubles

tsa if first cylinder + tsa of second cylinder

= 2πrh + 2πrh + 2πr^r(area of base and above )

= 4πrh + 2πr^2

=πr(4h+2r)

hope it helps ｡◕‿◕｡