Question

If Dia Is 10 years Old. How Many Years have To add with Twice Of her Age To Get 24?
(Answer With Rough)​

Answer 1

Answer:

John, twelve years old, is three times as old as his brother. How old will John be when he is twice as old as his brother?

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Jean-Pierre Erasmus

Answered 3 years ago

John will be 16 years old when he is twice as old as his brother, which will then be 8.

Currently John is 12, and is three times as old as his brother thus, his brother is 12 divided by 3, which is 4 years old.

Thus when John is 12, his brother is 4. There is thus a 8 year difference between the two brothers.

So we can write a small equation to solve John’s age when he will be twice as old.

John’s age = X

John’s Brothers age = X - 8

Thus : X - 8 = X/2, John’s age minus the difference of 8 years must equal John’s age divided by 2, to make John twice as old as his brother.

X - 8 = x/2

X = X/2 + 8

(2*X)/2 = (X/2) + (16/2) - Place all numbers as fractions of 2 by multiplying x 2

2*X = X + 16

2*X -X = 16

X+X -X = 16

X = 16

John’s age will be 16 when he is twice as old as his brother which will be 8.

John : 16 - 12 = 4 : Subtract current Age

His Brother: 8 - 4 = 4 : Subtract current Age

In 4 years time John will be twice as old as his brother

16 = 8 * 2

Answer 2

Answer:

4 year

Step-by-step explanation:

Given that

Dia is 10yr old.

To find

Year added with twice of dia's age to get 24

Solution

Let

x year will added with twice of dias age to get 24 it will be as

$2 \times 10 + x = 24$

by multiplication we get

$20 + x = 24$

now

$x = 24 - 20$

by subtraction we get

$x = 4$

hence 4 year will be added with twice of dias age to get 24.