It is given that the area of a triangle ...

It is given that the area of a triangle is A. The values of its perimeter, inradius, circumradius and the average of the lengths of the medians are respectively, p,r,R and d. The ratio A : p is equal to

A

`r :1`

B

`(R +r) ^(2) :d`

C

`r :2`

D

`(R -r) ^(2) :r`

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The correct Answer is:

C

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