perimeter and area of the rectangle are 28mts and 40m square then find its length and breadth
akshisaha06:
I didn't understand the question .
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7
Perimeter = 2(l+b) = 28
l+b = 14
l = 14 - b
Area = l×b = 40
= (14-b) × b = 40
14b-b^2=40
b^2- 14b +40 = 0
b^2-10b-4b+40= 0
b(b-10) -4(b-10)
b= 10 or 4
l+b = 14
l = 14 - b
Area = l×b = 40
= (14-b) × b = 40
14b-b^2=40
b^2- 14b +40 = 0
b^2-10b-4b+40= 0
b(b-10) -4(b-10)
b= 10 or 4
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2
refer to the above pic.
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