Question

In a room, we have one grandfather, two fathers, two sons, and a grand son. The age of one father is seven times the age of age his son. The age of the other father is twice his son's age. Assuming that there are only 3 people in the room and the grandfather is 70 years old, how old is the grandson?

Answer 1

Step-by-step explanation:

There are only 3 people,

Grandfather, father, and son.

Gandfather's age is 70, his age is 7 times his son's age , that is father. so let the age of father be x and his son's be y.

70=7(x)

x=10 that is the age of father.

2 times the son's age is the fathers age. so,

10=2(y)

y=5

Therefore, the age of son is 5 years.

Answer 2

Answer:

answer attached in photo