Tap 1 fills (1/10)th of the tub in a minute
Tap 2 fills (1/15)th of the tub in a minute
Tap 3 fills (1/30)th of the tub in a minute
(1/10)+(1/15)+(1/30)=(3/30)+(2/30)+(1/30)=(6/30)
The three taps will fill the tub in 30/6=5 mins
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This is an impressive answer. Congrats.
Thank you