rony who is sixteen years old, is four times as old as her brother. How old will Mary be when he is twice as old as her brother?
no idea. How old is Mary now?
Mary's age is 8
Given: 16-rony
Asked:age of mary
Solution:
16 is divided into 4 = 4 is the age of "her brother"
4 is multiplied by 2 = 8
16 represents the age of rony that is 4 times as old as her brother which is 4. Since Mary's age will be twice as her brother's age which is 4 so it's 8.
To find Mary's age when she is twice as old as her brother, we need to determine her brother's age and then calculate when Mary will be twice that age.
We are given that Rony is 16 years old and is four times as old as her brother. So, we can find her brother's age by dividing Rony's age by 4.
Let's calculate:
Rony's brother's age = Rony's age / 4
= 16 years / 4
= 4 years
Now we know that Rony's brother is 4 years old. To find out Mary's age when she is twice as old as her brother, we can proceed with the following steps:
1. Calculate Rony's brother's age when he is twice as old as he is currently:
Brother's age (when twice as old) = Brother's age * 2
= 4 years * 2
= 8 years
2. Determine the age difference between Rony and her brother when her brother is twice as old:
Age difference = Rony's age - Brother's age (when twice as old)
= 16 years - 8 years
= 8 years
3. Finally, add the age difference to Rony's current age to get Mary's age when her brother is twice as old:
Mary's age = Rony's age + Age difference
= 16 years + 8 years
= 24 years
Therefore, Mary will be 24 years old when her brother is twice as old as he currently is.