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Ne4ueva [31]
3 years ago
10

A rectangular plot of ground is 30 meters longer than it is wide. its area is 10,000 square meters.

Mathematics
1 answer:
dimulka [17.4K]3 years ago
6 0
A = W· L
10,000 = W ( W +30 ) = W² + 30 W
W² + 30 W - 10,000 = 0
W = \frac{-30+ \sqrt{900+40000} }{2}=  \frac{-30+202.24}{2} = 86.12
L = 86.12 + 30 = 116.12
Width of a plot is 86.12 m and lenght is 116.12 m.
Check : A = 116.12 · 86.12 ≈ 10,000
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