Question

Find the length of the diagonal of a rectangle whose length is $15cm$ and breadth is $8cm$.

Answer 1

Calculate the length of diagonal using Pythagoras theorem.

As we know, the length of diagonal of a rectangle $=\sqrt{l^2+b^2}$.

where $l$ is length and $b$ is breadth.

Given, length and breadth of the rectangle are $15cm$ and $8cm$ respectively.

Substitute the given lengths and breadths of the rectangle.

So, the length of diagonal

$$\begin{gathered} =\sqrt{{15}^2+8^2} \\ =\sqrt{225+64} \\ =\sqrt{289} \\ =17cm \end{gathered}$$

Hence, the length of the diagonal is $17cm$.