A grandfather's age in years is the same as his granddaughter's age in months. Together, they are 91 years old. How old is the grandfather?

The age of grandfather is 84 years

The age of granddaughter is 7 months.

Step-by-step explanation:

Given information

Grandfather's age in years is same as granddaughter's age in months.

Let, the age of granddaughter is in months

Then the age of grandfather will be in years

Now , according to the given information

On solving the above equation

We get,

Hence ,

The age of grandfather is 84 years

The age of granddaughter is 7 months.

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Grandfather is 84 the granddaughter is 7 years old(84 months

Step-by-step explanation:

We know the grandfather and the granddaughters age is a whole number meaning there are no decimals. the nearest number that is whole and lower than 91 is 84. 84 / 12 = 7  we can do this because 84 months is equivalent to 91 years ||| 84 + 7 = 91 therefore that is the answer