Chapter 12.9, Problem 20HP

To determine

To find : Which have a greater effect on SA.

Answer to Problem 20HP

Radius

Explanation of Solution

Given information :

The given information is, A cylinder has height ( $h$ ) = $6$ cm

Radius ( $r$ ) = $10$ cm

Formula Used:

Surface area of cylinder = $2\pi rh+2\pi r^2$

Calculation :

If we multiply by radius to $0.5$ of scale and in the other hand height by $0.5$ then surface area will effect more when radius multiply by $0.5$ because in formula.

Radius role is greater than height as in $2\pi rh$ effect is same but $2\pi r^2$ adding. Here in lateral surface area gives surface area will effect more by multiply $0.5$ to radius.