A solid cylinder of radius r and height h is palced over other cylinder same height and radius . The total surface area of the shape so formed is `4pirh + 4 pir^(2)`.

Explanation

False
Since , the total surface area of cylinder of radius , r and height , `h = 2pirh + 2 pir^(2)`
When one cylinder is placed over the other cylinder of same height and radius , then height of the new cylinder= 2h
and radius of the new cylinder = r
`therefore` Total surface area the new cylinder = `2pir (2h) + 2pir^(2)= 4 pih + 2pir^(2)`