defence exam Army Cadet College (ACC) Previous Year Papers Mock Quantitative Aptitude Time and Work Work Efficiency
A battery had enough charge to light 10 bulbs for a certain period of time. After 10 minutes of usage, 2 bulbs were disconnected from the battery, All the balance bulbs remained powered up just as long as before. How long was that?
1
30 minutes
2
10 minutes
3
60 minutes
4
40 minutes