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Posted By: jegadesh Member Level: Gold Posted Date: 20 Dec 2007 Category: Aptitude Test

There is a water-cask with three different water-taps. With the smallest tap the water-cask can be filled in 20 minutes. With middle the tap the water-cask can be filled in 12 minutes. With the largest tap the water-cask can be filled in 5 minutes. How long does it take to fill the water-cask with the three taps together?

Select Answer:

3 minutes.
2 minutes.
4 minutes.
6 minutes.

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