For `r gt 0, f(r )` is the ratio of perimeter to area of a circle of r – InterviewSolution

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1.	For `r gt 0, f(r )` is the ratio of perimeter to area of a circle of radius r. Then f(1) + f(2) is equal toA. 1B. 2C. 3D. 4
Answer» Correct Answer - C f(r ) is ratio of perimeter to area of circle of radius r. Perimeter of circle = `2pir` Area of circle = `pir^(2)` `f(r )=(2pir)/(pir^(2))=(2)/(r)` `"So, f(1) + f(2)"=(2)/(1)+(2)/(2)=2+1=3`

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