Basement 81681

After the flood, the Nováks would pump water out of the basement with one pump in 120 minutes, the second in 300 minutes, and the third in 600 minutes. How many minutes will it take them to pump the water out of the basement if they use all the pumps at once?

Correct answer:

t =  75 min

Step-by-step explanation:

t1=120 min t2=300 min t3=600 min  q=t11+t21+t31=1201+3001+6001=6005+6002+6001=6005+2+1=6008=7510.0133 1/min  t   q = 1  t=1/q=1/751=1:751=1 175=11 75=175=75 min

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Looking for calculator of harmonic mean?
Looking for a statistical calculator?
Need help calculating sum, simplifying, or multiplying fractions? Try our fraction calculator.
Do you want to convert time units like minutes to seconds?

You need to know the following knowledge to solve this word math problem:

Units of physical quantities:

Themes, topics:

Grade of the word problem:

Related math problems and questions: