Present age of a grandfather is 72 years, while his grandson's age is 12 years. Then the ratio of their age after 8 years would be

6:1

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5:1

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4:1

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9:1

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Solution

The correct option is C
4:1

Present age of the grandfather is 72 years and present age of the grandson is 12 years.
After 8 years, Grandfather's age would be 80 and grandson's age would be 20 years.
So, the ratio of their respective ages would be $\frac{80}{20} = \frac{4}{1} = 4 : 1$ .

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Present age of a grandfather is 72 years, while his grandson's age is 12 years. Then the ratio of their age after 8 years would be

The correct option is C 4:1 Present age of the grandfather is 72 years and present age of the grandson is 12 years. After 8 years, Grandfather's age would be 80 and grandson's age would be 20 years. So, the ratio of their respective ages would be 8020=41=4:1.

The correct option is C
4:1

Present age of the grandfather is 72 years and present age of the grandson is 12 years.
After 8 years, Grandfather's age would be 80 and grandson's age would be 20 years.
So, the ratio of their respective ages would be $\frac{80}{20} = \frac{4}{1} = 4 : 1$ .