Two pipes can fill a tank in 40 and 48 minutes respectively and a was…

Question

Two pipes can fill a tank in 40 and 48 minutes respectively and a waste pipe can empty 3 gallons per minutes. All the three pipes working together can fill the tank in 30 minutes, The capacity of the tank is-

Accepted Answer

Option D. 240 gallons. Answer & Solution Answer: Option D Solution: Work done by the waste pipe in 1 minute & = 130 - ( 140 + 148 ) & = ( 130 - 11220 ) & = - 180 [ - \, Nagetive sign means emptying ] & Volume of 180 part = 3 galons & Volume of whole tank & = ( 3 × 80 ) gallons & = 240 gallons