Chapter 12.3, Problem 8WE

To determine

To calculate: The lateral area

Answer to Problem 8WE

The value is $r=5$ units

Explanation of Solution

Given information: Consider the given information,

Total area of cylinder is = $100\pi$

And r=h

Formula used: Consider the given formula,

r = radius, h = height

Total area = $2\pi rh+2\pi r^2$

And r=h

Calculation : Consider the given information the formula is,

Total area = $2\pi rh+2\pi r^2$

  $2\pi rh+2\pi r^2=100\pi$

  $2r\times r+2r^2=100$

  $4r^2=100$

  $r^2=\frac{100}{4}=25$

  $r=5$ units