Question

Mike's mother is 20 years older than Mike. Mike's grandpa is 3 times older than Mike's mother.

Find Mike's age If they all together have 100 years old.

Answer 1

Answer:

mike's age is 4 years

Step-by-step explanation:

let mike's age be x years

according to given condition,

mike's mother age=x+20 years

mike's grandpa age=3(x+20)=3x+60 years

x+(x+20)+(3x+60)=100

thus,

5x+80=100

x=20/5

x=4years

Mike is 4 year old