How old is he?
A father is three times as old as his son. In eight years, he will be twice as old as his son. How old is the son now?
Word Problem
A bridge is built across a river. One quarter of the bridge is over the left bank of the river and one third of the bridge is over the right bank. The river is 120 m wide. How long is the bridge?
Let the son's current age be x years.
ReplyDeleteSince the father is three times as old, his age is 3x years.
In 8 years, their ages will be:
Son: x + 8
Father: 3x + 8
According to the problem, in 8 years, the father will be twice as old as the son:
3x + 8 = 2(x + 8)
Solving the Equation:
3x + 8 = 2x + 16
Subtract 2x from both sides:
x + 8 = 16
Subtract 8 from both sides:
x = 8
Final Answer:
The son is 8 years old now.