Question

Plzz... Quick... Help me out with the problem... ​

Answer 1

Answer:

Length = 20 m

Breadth = 20 m

This is ur answer.

Answer 2

Answer:perimeter of rectangle =2(l + b)

i. e 2(l + b) = 80

l + b = 40

l = 40- b.................... eq-1

area = 400

l x b =400

(40 - b) b = 400 ( putting value from eq -1)

b²- 40b + 400 =0

b² -20b - 20b + 400 = 0

b(b - 20) -20(b -20) =0

(b - 20) (b - 20) = 0

So, b = 20 cm

putting value of b in eq -1

we get, l= 40- 20

= 20 cm

Step-by-step explanation: