document.write( "Question 565498: a water-tank can be filled by any combination of three different taps. with the smallest tap the tank can be filled in 20 minutes.with the middle tap the tank can be filled in 12 minutes.with the largest tap the tank can be filled in 5 minutes.how long does it take with all three taps running?
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Algebra.Com's Answer #365816 by scott8148(6628)\"\" \"About 
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(x / 20) + (x / 12) + (x / 5) = 1 \n" ); document.write( "
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