Question

to fill the cistern, if both the tap and the pipe are opened together
9. Pipe X can fill a tank in 10 hours while pipe Y can do the same in 15 hours. How long will they take
the tank, if both the pipes are opened simultaneously?
10. A cistern has two inlets A and B which can fill it in 12 minutes and 15 minutes respectively. Ano​

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