Question

7. The sum of ages of three persons is 100 years. What will be the sum of their ages
after 5 years.

Answer 1

Let’s assume that

First person age: A

Second person age: B

Third person age: C

So according to the above question: A+B+C = 100 Years —————— Step 1

After 5 years:

First person age: A+5

Second person age: B+5

Third person age: C+5

Hence the summation of their ages would be:

=> (A+5)+(B+5)+(C+5) => (A+B+C)+15 ———————-substituting from Step 1 above

=> 100+15

=> 115 Years

fter 5 years their ages will be

x+5′y+5,z+5

total sum=x+5+y+5+ z+5 =x+y+z +15 substituting the value of x+y+z

total sum of their ages=100+15=115