If the present age of a grandfather is 72 years while his grandson's age is 12 years then find the ratio of their age after 8 years.

5:1

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6:1

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9:1

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4:1

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Solution

The correct option is D
4:1

The present age of grandfather is 72 years and his grandson is 12 years.
After 8 years,the age of :

grandfather = 72 + 8 =80 years

his grandson = 12 + 8 = 20 years

So, the ratio of their respective ages would be $\frac{80}{20} = \frac{4}{1} = 4 : 1$

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If the present age of a grandfather is 72 years while his grandson's age is 12 years then find the ratio of their age after 8 years.

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

The correct option is D
4:1

The present age of grandfather is 72 years and his grandson is 12 years.
After 8 years,the age of :

grandfather = 72 + 8 =80 years

his grandson = 12 + 8 = 20 years

So, the ratio of their respective ages would be $\frac{80}{20} = \frac{4}{1} = 4 : 1$