Question

If the radius of a cylinder is increased from 4 cm to
16 cm and the surface area of it kept same. If its
height is 4 cm, what will be its new height?


Mass answer will be reported ​

Answer 1

We begin by getting the surface area of the cylinder.

That is the initial surface area.

Surface area of a cylinder is given by :

Area = 2πr^2 +2πrh

π = 3.142

Doing the substitution we have :

Area = 3.142 × 4 × 4 × 2 = 100.544 + 2 × 3.142 × 4 × 4

= 100.544 + 100.544 = 201.088 Square centimeters.

If the radius is changed to 16 cm.

The new surface area will be :

Area = 2 × 3.142 × 16 × 16 + 2 × 3.142 × 16 × h

1608.704 + 100.544h = 201.088

100.544h = 201.088 - 1608.704

100.544h = -1407.616

h = 1407.616/100.544

h = - 14 cm

Since the height is negative it means this transformation is not possible.

I hope it will help you

please mark me as brainliest please

Answer 2

Answer:

what is your name please answer me