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One tap can fill a barrel in 3 minutes and another can fill it in 6 minutes. Both taps are turned on together for 1 minute. What fravction of the barrel will be filled in 1 minute?

In 1 minute the first tap will fill 1/3 of the barrel and the other will fill 1/6 of the barrel.

1/3 + 1/6 = ?

th awnswer is this
1/2

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