Question

PM water holes can feel a pull in 30 minutes a larger waterholes Canfield the same pool in 20 minutes a clove hoses are turned on at the same time how long would it take to fill the pool

Answer 1

Answer:

12 minutes.

Step-by-step explanation:

A water hole can fill a pull in 30 minutes and a larger hole can fill the same pull in 20 minutes.

Therefore, the small hole can fill in 1 minute the $\frac{1}{30}$ part of the pull and the large hole can fill in 1 minute the $\frac{1}{20}$ part of the pull.

So, if both the holes are open within 1 minute they will fill the tank by $(\frac{1}{20} + \frac{1}{30}) = \frac{1}{12}$ part of the pull.

Hence, the total pull will be filled within $1 \div \frac{1}{12} = 12$ minutes. (Answer)