Question

Breath of a rectangle is 20centimetre and diagonal is 29 . What is the area of this rectangle

Answer 1

Here's the required answer to your question

Answer 2

Answer:

420cm²

Step-by-step explanation:

=> Diagonal = √l² + b²

=> 29cm = √(20)² + b²

=> 29 = √400 + b²

(om squaring both sides)

=> (29)² = {√400 + b²}²

=> 841 = 400 + b²

=> 841 - 400 = b²

=> 441 = b²

=> b = √441

=> b = 21 cm.

Area of the rectangle = l × b

= 20 × 21

= 420 cm² ans.