Question

Area of two rectangles A and B are in the ratio 3:4 respectively. Sides of rectangle A are in the ratio 3: 1 respectively and perimeter of rectangle B is 50 cm
and its breadth is 5 cm. What is the perimeter of rectangle A?
O 20 cm
O 30 cm
O 36 cm
40 cm
O 44 cm​

Answer 1

Answer:

Let length =5x and breadth=2x

Area of rectangle=5x×2x=10x

2

Perimeter of rectangle=2(l+b)=2×(5x+2x)=14x

Now,

A

P

=

3

1

⇒

10x

2

14x

=

3

1

⇒x=4.2

∴Length of rectangle=5×4.2=21 units.