Question

Amisha is n years old.Bobby her brother is 9 years older than amisha.Their mother is 3 times as old as amisha.Their father is twice as old as Bobby. Write down expressions of the given expressions.
1)Bobby's Age
2)Their mother's age
3)Their father's age
4)If the sum of the ages of the four members of the family is 132 then write down the equation in terms of n.
5)What is the age of Amisha's mother?

Answer 1

(i) bobby age = (n + 9) years
(ii) their mother age = 3n years
(iii) their father age = 2(n + 9) years
(iv) n + (n + 9) +3n + 2(n+9) =132
(v) n + n +9 + 3n + 2n + 18 = 132
7n + 27 = 132
7n = 132- 27
7n = 105
n = 105/7
n = 15
Their mother age = 3n
3×15 = 45 years