A father and son work in the same factory. The father takes 30 minutes to walk to his factory and the son is able to cover the same distance in only 20 minutes. If the father were to leave the house 5 minutes earlier, how soon would his son catch up with his father?
Answer
The son will catch up with his father in 10 minutes.
In 10 minutes, the son would have traveled half the distance, since his total traveling time is 20 minutes.
The father started 5 minutes earlier than the son, so he would have traveled for a total of 15 minutes when his son reached him. Therefore, the father would have also traveled half the distance in 15 minutes.