You have 3 taps : the first one make 6 hours to fill the swimming pool the second tap takes 12 hours the last tap takes 4 hours If we open the 3 taps at the same time what time it will take to fill the swimming pool ?

1 Answer
George C.
May 4, 2017

#2# hours

Explanation:

If you run all three taps for #12# hours then:

  • The first tap would fill #2# swimming pools.
  • The second tap would fill #1# swimming pool.
  • The third tap would fill #3# swimming pools.

That makes a total of #6# swimming pools.

So we just need to run the taps for #12/6 = 2# hours.

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