JEE Math Practice Question
Let a, b and c be the length of sides of a triangle ABC such that $${{a + b} \over 7} = {{b + c} \over 8} = {{c + a} \over 9}$$. If r and R are the radius of incircle and radius of circumcircle of the triangle ABC, respectively, then the value of $${R \over r}$$ is equal to :
- A.$${5 \over 2}$$
- B.2
- C.$${3 \over 2}$$
- D.1
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