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7 years ago, the ages (in years) of A an...

7 years ago, the ages (in years) of A and B were in the ratio 4: 5, and 7 years hence they will be in the ratio 5: 6. The present age of B is
7 वर्ष पूर्व, A तथा B की आयु (वर्षों में) 4: 5 के अनुपात में थी, तथा 7 वर्ष के बाद ये 5: 6 के अनुपात में होगी। B की वर्तमान आयु है?

A

56 years

B

63 years

C

70 years

D

77 years

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