Plzz... Quick... Help me out with the problem...
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Answered by
8
Answer:
Length = 20 m
Breadth = 20 m
This is ur answer.
Answered by
1
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:
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