Question

The present ages of Grandmother and Grandfather are in

By using Cross product method We get present age of Grandmother is 108 20 years before 108-20 88-year ans.

6:8 if the ratio of Grandmother age after 8 years and Grandfather age after 4 years becomes 5:7 then find the age of Grandmother before 20 years?

A 39

B 51

C 76

D 88

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