Question

3. Find the area of a rectangle whose length is twice the breadth and perimeter is 30 cm.
​

Answer 1

Answer:

==========================================

Area if the rectangle = 50 $cm^{2}$

==========================================

Step-by-step explanation:

==========================================

Let the breadth of the rectangle be "b"

So, length of rectangle = 2b

Also, perimeter = 30

i. e. 2 ( l  + b ) = 30  

So, 3b is 15  

So, b is 5 and l is 2 × 5 = 10

Area of rectangle

= l × b

= 10 × 5

= 50 $cm^{2}$

==========================================

Hope my answer helps...  

Please mark it as the brainliest...