Question

Find the base of a triangle whose area in $220$ ${\text{cm}}^2$ and height is $11$ cm.

Answer 1

Area of triangle$=\frac{1}{2}\times base\times height$

$\therefore 220=\frac{1}{2}\times base\times 11$

$\therefore$ base$=\frac{220\times 2}{11}$

$=20\times 2$

$=40$cm.