Question

The lateral surface area of a right circular cylinder of radius (2r) and
height (2h) is
(a) 2nrh
(b) 4Pierh (c) 8pierh (d) none of these
​

Answer 1

Answer:

(c)

Step-by-step explanation:

lateral surface area of a cylinder = 2πrh

here radius = 2r

height = 2h

Substituting in the formula,we get

LSA = 2π(2r)(2h)

=8πrh

Answer 2

Answer:

(c)  8π rh

Step-by-step explanation:

LSA of  cylinder  = 2 π r h

                             = 2 x π x2r x 2h

                            = 8π rh