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Two pipes can fill a cistern separately in 10 hours and 15 hours. They can together fill the cistern in
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- 6 hours
- 7 hours
- 8 hours
- 9 hours
- 6 hours
Correct Option: A
As per the given in question , we have
| Part of the cistern filled by both pipes in 1 hour = | + | = | = | ||||
| 10 | 15 | 30 | 6 |
∴ The cistern will be filled in 6 hours.
