Question

A child walked $5m$ to cross a rectangular field diagonally. If breadth of field is $3m$, its length is ________.

• A. $4m$
• B. $3m$
• C. $10m$
• D. $6m$

Answer 1

The correct option is A $4m$

we k.n.t square of diagnol is sum of squares of adjacent sides.

diagnol=5m

breadth=3m

Let lenght be x

$5^2=3^2+x^2$

$x^2=25-9=16$

$x=\sqrt{16}=4$

$\therefore$ Length of a rectangle is $4m$.