Question

Find the surface area(in $c{m}^2$) of the square pyramid shown below

Answer 1

Here, $a=10cm$ and $h=12cm$

Surface area of square pyramid $=$ Base area $+\frac{1}{2}\times$ Perimeter $\times$ Slant length

$=a^2+\frac{1}{2}\times 4a\times l$

$=a^2+2a\times l$

$=(10{)}^2+\times 2(10)\times 12$

$=100+240$

$=340c{m}^2$