state gov UP Police Assistant Operator (Radio Cadre) Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes can fill a tank in 24 and 30 minutes, respectively, and a hole at the bottom of the tank can empty the tank at the rate of 4 gallons per minute. All three pipes work together and fill the tank in 20 minutes. Find the capacity of the tank in gallons.
1
120
2
160
3
180
4
140