Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per...........

Quant (SSC) Pipes&cistern

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:

60 gallons

100 gallons

120 gallons

180 gallons

छोटे Courses बड़े Results

Master Pipes&cistern

Prepare through Micro-courses

Try Now

Explanation:

Work done by the waste pipe in 1 minute
=1/15−(1/20+1/24)=1/15−11/120 = −1/40 [-ve sign means emptying]
Volume of 1/40part = 3 gallons
Volume of whole = (3 x 40) gallons = 120 gallons.