Question

I think that nobody knows answer of this

Answer 1

Perimeter =80

2(l+b)=80
l+b=40
L=40-b
We know that area=lb
40-b*b=400
40b-b²=400
40b-b²-400=0
-b²+40b-400=0
b²-40b+400=0
b²-20b-20b+400=0
b(b-20)-20(b-20)=0
(b-20)(b-20)=0
b=20
L=40-20=20

We can design a rectangular park by using given measurement.

Answer 2

Answer:

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Step-by-step explanation:

Perimeter =80

2(l+b)=80

l+b=40

L=40-b

We know that area=lb

40-b*b=400

40b-b²=400

40b-b²-400=0

-b²+40b-400=0

b²-40b+400=0

b²-20b-20b+400=0

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

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

b=20

L=40-20=20