Question

A tank gets filed in 2 hours and 24 minutes when all the five pipes (including both inlet and outlet pipes) are opened
simultaneously. One inlet pipe can fill the tank in 4 hours while one outlet pipe can empty the half-filled tank in 3 hours. How many inlet pipes are attached to the tank?

Answer 1

Answer:

Answer: Son is 15 and father is 55.

To solve this problem, find a suitable age that is three times older or younger than the other one, depending on which age you want to find first.

Then, you get the difference and it must be 40 years.

Assume b is the son’s age after 5 years.

The father’s age will be 3b.

3b - b = 40

2b = 40

b = 20

After 5 years, son will be 20 and the father will be 60.

You subtract each age with 5 and you will get their present ages.

Son’s present age = 20 - 5 = 15

Father’s present age = 60 - 5 = 55