Question

the length and breadth of a rectangular field are in ratio 7:5 if it's perimeter is 480 m find its dimensions​

Answer 1

Answer:

x = 20. So the length is = 20 x 7 = 140

Step-by-step explanation:

Perimeter = 2 x ( length + breadth )

So given perimeter = 480

Equating the 2 equations -

2 x ( 7x + 5x ) = 480

12x = 480/2

12x = 240

x = 240/12

x = 20.

So the length is = 20 x 7 = 140.

And breadth = 20 x 5 = 100

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Answer 2

Answer:

L=280m, B=200m

Step-by-step explanation:

The length of the rectangle is 7 units, the breadth is 5 units. So, there is a total of 12 units. Now we have to find the length of a unit. Since, there are 12 units, we should divide the perimeter by 12. In this case, 480m / 12. We get 40m.

Length = 7*40m= 280m

Breadth = 5*40m= 200m