क्या 1 परिमाप 80 मीटर तथा क्षेत्रफल 400 मीटर स्क्वायर के एक पार्क को बनाना संभव है यदि है तो उसकी लंबाई और चौड़ाई ज्ञात कीजिए
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given;
parameter = 80m area = 400 msq
parameter of rectangle = 2 (l+b)
80= 2(l+b)
80/2= l+b
40 = l+b
l = 40-b ........eqn 1
area of rectangle = L*b
400 = L*b
400 = (40-b) b ...... from eqn...1
400 = 40b - b.b
b.b-40b+400=0
using formula;
here a= 1; b= 40 c= 400
d= (b.b -4ac)
d= 1600-1600
d= 0
hence ;breath = -b/2a
= -(-40)/2.1
= 20 m
hence; breath= 20m
length = 40-breath
= 40- 20
= 20m
hence; yes it is possible
and length and breath is equal to 20 m.........ans......
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