![A pipe can fill a tank in 6 hours and another pipe can empty the tank in 12 hours. If both the pipes are opened at the same time, the tank can be filled in](https://www.gkseries.com/blog/wp-content/uploads/2023/07/A-pipe-can-fill-a-tank-in-6-hours-and-another-pipe-can-empty-the-tank-in-12-hours.-If-both-the-pipes-are-opened-at-the-same-time-the-tank-can-be-filled-in.jpg)
Question | A pipe can fill a tank in 6 hours and another pipe can empty the tank in 12 hours. If both the pipes are opened at the same time, the tank can be filled in | |
Type | multiple_choice | |
Option | 10 hours | incorrect |
Option | 12 hours | correct |
Option | 14 hours | incorrect |
Option | 16 hours | incorrect |
Part of the tank filled in one hour = 1/6
Part of the tank emptied in one hour = 1/12
= 1/6 – 1/12
![](https://www.gkseries.com/blog/wp-content/uploads/2023/07/image-126.png)
1/12
Part of the tank can be filled in one hour.
∴ The tank will be filled completely in 12 hours.
Solution 2:Apply formula; =
![](https://www.gkseries.com/blog/wp-content/uploads/2023/07/image-127.png)
X = 6 hours and Y = 12 hours
∴
![](https://www.gkseries.com/blog/wp-content/uploads/2023/07/image-128.png)
= 12 hours