Question

What is the surface area of a television $20$ inches long, $15$ inches wide and $5$ inches high?

• A. $980{in}^2$
• B. $950{in}^2$
• C. $915{in}^2$
• D. $925{in}^2$

Answer 1

The correct option is B $950{in}^2$

Surface area$=2($Length $\times$ width $+$ Length $\times$ height $+$ Width $\times$ height$)$
Length $=20$ in; Height $=5$ in; Width $=15$ in
$=2\times (20\times 15+20\times 5+15\times 5)$
$=2\times (300+100+75)$
$=2\times 475$
$=950{in}^2$