Chapter 12.8, Problem 9IP

To determine

To find : Lateral and surface area of prism.

Answer to Problem 9IP

  $7.2{\text{ cm}}^{\text{2}}$ and $70.96{\text{ cm}}^{\text{2}}$

Explanation of Solution

Given information :

The given information is, Length $2.2$ cm, width $1.4$ cm, height $9$ cm, prism is rectangular.

Formula Used:

Lateral Area = Perimeter × height

Surface area = $2(lb+bh+hl)$

Calculation :

  $L=2(2.2+1.4)=7.2{\text{ cm}}^{\text{2}}$

Surface Area

= $2(2.2\times 1.4+1.4\times 9+9\times 2.2)$

  $=2(3.08+12.6+19.8)=70.96{\text{cm}}^{\text{2}}$

Lateral surface area is $7.2{\text{cm}}^{\text{2}}$ and surface area is $70.96{\text{cm}}^{\text{2}}$ .