Question

(b) length = 20 m and perimeter = 60 m find the area of a rectangular field​

Answer 1

Answer:

we know that 2(P+B)= perimeter

so 2(20+B)= 60

20+B=30

B=30-20

B=10

and area =

P×B

so

20×30

600cm2

hope it helps have a nice day ☠️☠️☠️☠️☠️

Answer 2

Step-by-step explanation:

Perimeter of rectangle = 60m

Length =20m

perimeter of rectangle = 2×[l + b ] = 60 [2 × (20 + b)]

breadth = 60÷2

+ 20 = 30

= 30-20

= 10m

Since breadth is 10 m

Now ,

Area of rectangular field = l×b

= 20×10

= 200m