The length and breadth of a rectangular field are 50 m and 40 m respectively. Find its area.
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Answered by
10
Answer: Let width of gravel =x m
area of field = 50×40=2000 m but this is the answer
2
area of flower bed = (50−2x)(40−2x)
Step-by-step explanation: = cost of flower bed+ grovelling path
∴52000=[(50−2x)(40−2x)×30] +[(2×50×x)+2(40−2x)x]×20
=52000=[(2000−100x−80x+4x
2
)×30] +[100x+80x−4x
2
]×20
=52000=60000−5400x+120x
2
+3600x−8x
2
=40x
2
−1800x+8000=0
=x
2
−45x+200=0
∴x=5,40
Answered by
2
Answer:
Step-by-step explanation:
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