The sum of the present ages of A, B and C is 131 years. 17 years ago from now, the ratio of their ages was 6 : 10 : 4. What is the present age of C (in years)?

The sum of the present ages of A, B and C is 131 years. 17 years ago from now, the ratio of their ages was 6 : 10 : 4. What is the present age of C (in years)?
A, B और C की वर्तमान आयु का योग 131 वर्ष है। अब से 17 वर्ष पहले, उनकी आयु का अनुपात 6 : 10 : 4 था। C की वर्तमान आयु (वर्षों में) ज्ञात कीजिए।