Question

Diagonal of a rectangle is $25cm$ and length is $20cm$. Find the area of the rectangle?

Answer 1

Given , $d=25cm,a=20cm$

$b^2+a^2=625$

$\Rightarrow b^2=625-400$

$\Rightarrow b^2=225$

$\therefore b=15cm$

$\therefore$ Area of rectangle $=ab$

$=20\times 15$

Area of rectangle $=300c{m}^2$