Discussion :: Area
- The sides of a rectangular field are in the ratio 3: 4 and its area is 7500 m2. What is the cost of fencing it at 25 paise per meter?
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Answer : Option A
Explanation :
Ratio between the sides of rectangle = 3: 4
Let the ratio constant be x then,
Length = 3x and breadth = 4x
Area = L x B
7500=3x × 4x=12x2
= x2=625
x=25
Length = 3 x 25 = 75 m, and Breadth = 4 x 25 = 100 m
Perimeter = 2(75 + 100) = 2 x 175 = 350 m
Cost of fencing 1 meter = 25 paise
Cost of fencing 350 m = 350 x 25 = 8750 paise
In rupees: Rs. 87.50
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