Teaching NVS Junior Secretariat Assistant (JSA) Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Pipes A and B can fill a tank in 15 hours and 12 hours, respectively. Pipe C alone can empty the full tank in 10 hours. If all the three pipes are opened together for 2 hours 40 minutes, then what part of the tank will remain unfilled?
1
\(3\over20\)
2
\(13\over15\)
3
\(2\over15\)
4
\(17\over20\)