Question

The perimeter of a rectangle is 30 m and the ratio of the length to the breadth is 7:3. Find the

area of rectangle.​

Answer 1

Answer:

Let ratio be x= 7x and 3x

Perimeter of rectangle = 2 (l+b)

30m = 2 (7x +3x)

30m/2 = (10x)

15m = 10x

15m/10 = x

1.5m = x

Hence, 7x = 7×1.5m = 10.5m

3x = 3×1.5m = 4.5m

Area = l×b

= 10.5×4.5

= 47.22

Answer 2

Answer:

47.25 m square

Step-by-step explanation:

let the length and breadth be x = 7x+3x

perimeter of a rectangle is 2(l+b).

2(7x+3x)=30m

2(10x)=30m

10x = 30/2

10x = 15

x = 15/10

x = 3/2

length = 7x = 7 × 3/2 = 21/2 = 10.5

breadth =3x = 3 × 3/2 = 9/2 = 4.5

Area = length × breadth

= 47.25 m square