Question

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?

Answer 1

Answer: 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

Answer 2

Answer:

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 $x$ in months

Then the age of grandfather will be $12x$ in years

Now , according to the given information

$x+12x=91$

On solving the above equation

We get,

$13x=91\\x=7$

Hence ,

The age of grandfather is 84 years

The age of granddaughter is 7 months.

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