Question
Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is:
Answer: Option C
Was this answer helpful ?
Work done by the waste pipe in 1 minute = \(\frac{1}{15}-\left(\frac{1}{20}+\frac{1}{24}\right)\)
= \(\left(\frac{1}{15}-\frac{11}{120}\right)\)
= \(-\frac{1}{40}\) . [-ve sign means emptying]
So, Volume of \(\frac{1}{40}\) part = 3 gallons.
Volume of whole = (3 x 40) gallons = 120 gallons.
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution