If the radius of base of a cylinder is doubledand the height remains u

1.	If the radius of base of a cylinder is doubledand the height remains unchanged, its curvedsurface area becomes:7.doubledthree timeshalfno change
Answer» Letrandhbe the radius and height of original cylinder respectively. Curved surface area of original cylinder, S1= 2πrh If the radius of base of cylinder is doubled, then New radius,R= 2r Curved surface area of new cylinder, S2= 2π(2r)h= 2 × 2πrh= 2 S1 ∴ Curved surface area of the new cylinder is twicethe curved surface of the original cylinder. give me by step by step please give me by step wise

If the radius of base of a cylinder is doubledand the height remains unchanged, its curvedsurface area becomes:7.doubledthree timeshalfno change

Answer»

Letrandhbe the radius and height of original cylinder respectively.

Curved surface area of original cylinder, S1= 2πrh

If the radius of base of cylinder is doubled, then

New radius,R= 2r

Curved surface area of new cylinder, S2= 2π(2r)h= 2 × 2πrh= 2 S1

∴ Curved surface area of the new cylinder is twicethe curved surface of the original cylinder.

give me by step by step

please give me by step wise