Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Four pipes can fill a cistern in 15, 20, 30 and 60 hours respectively. The first was opened at 6 AM, the second at 7 AM, the third at 8 AM and the fourth at 9 AM. When will the tank be full?
1
11 AM
2
12 PM
3
1 PM
4
1 : 30 PM