Question

Two pipes can fill the tank in 20 as well as 24 minutes as well as the waste pipe can empty 3 gallons per minute all three pipes working together can fill a tank in 15 minutes capacity of tank has been

Answer 1

Part filled by 1st pipe = 120

Part filled by 2nd pipe in 1 min = 124

Part filled by all the pipes in 1 min = 115

Work done by the waste pipe in 1 min

= 115−(120+124)

=115−(6+5120)

= 115−1120

= 8−11120

=(−3120)

=(−140) [-ve sign indicates emptying]

Now, volume of 140 part = 6 gallon

Therefore, Volume of whole tank

= 40×6 = 240 gallon

Hope this helps you ☺️☺️⭐✨✨⭐