Question

find the length of diagonal of a rectangle side is 15m and 20m

Answer 1

diagonal=root over length^2 +breadth^2
$\sqrt{15^{2} + 20^{2} }$
$\sqrt{225 + 400}$
$\sqrt{625}$
=25

Answer 2

Solutions :-

We have,

Length = 20 cm
Breadth = 15 cm

Let the Diagonal of rectangle be x

Find the length of Diagonal of a rectangle :-

(Diagonal)² = (Length)² + (Breadth)²
=> x² = (20)² + (15)²
=> x² = 400 + 225
=> x² = 625
=> x = √625 = 25

Hence,
Length of Diagonal of rectangle is 25 cm