Question

In a rectangle ABCD, AB = 20 cm, $\angle$ BAC = ${60}^{\circ }$. The length of side BC is :

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

The give figure illustrates the situation mentioned in the question:
Let the length of breadth 'BC' be = x cm.
In Triangle ABC,
$tan{60}^{\circ }=\frac{x}{20}\Rightarrow \sqrt{3}=\frac{x}{20}\Rightarrow x=20\sqrt{3}cm.$