Question

The length of a rectangular field is 20 m more than its breadth. If the perimeter of the field is 280 m,
what is its length

Answer 1

Answer:

The length is 80 m and breadth is 60 m.

Step-by-step explanation:

Let's suppose the length is x and breadth is y

x = 20 + y

Then,

perimeter = 2 × (l + b)

280 = 2 × ( x + y)

280 = 2 × ((20 + y) + y)

280 = 2 × (2y + 20)

280 = 4y + 40

280 - 40 = 4y

240/4 = y

60 = y

then, x = 20 + y

x = 80