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Let the width of the rectangle = x cm Then, 350% of x = 77 x = 77 × 100/350 = 22 cm Perimeter of the rectangle = 2(length + width) = 2 × (77 + 22) = 198 cm Perimeter of the square = (198 + 18) = 216 cm The sides of the square = 216/4 = 54 cm The area of the square field without street = (54)2 sq. cm = 2916 sq. cm The area of the square field with street = (54 + 20)2 sq. cm = 5476 sq. cm The area of the street = 5476 – 2916 = 2560 sq. cm The total cost of constructing the street = 2560 × 26 = Rs. 66,560
The correlation coefficient between X and -X is:
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US$/€ ...
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