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The ratio of present ages of Rahul and ...

The ratio of present ages of Rahul and his sister is 3 : 4. Before 10 years the ratio of their ages was 13:19. What is Rahul's present age (in years)?
राहुल और उसकी बहन की आयु में अनुपात 3: 4 है। 10 वर्ष पहले उनको आयु में अनुपात 13 : 19 था। राहुल की वर्तमान आयु (वर्ष में) क्या है?

A

36

B

48

C

42

D

54

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