text: are you goog in maths? (refer to details for the actual question) thnks!!? a tap can fill a tank in 15 hrs. another tap can fill the same tank in 12 hrs. how long will it take for the 2 taps to fill the tank to 3/5(three-fifth)? tap 1: 15 hours - 1 tank => 1 hour - (1/15) tank tap 2: 12 hours - 1 tank => 1 hour - (1/12) tank tap 1 and 2: 1 hour - (1/15) + (1/12) = (3/20) tank  since, (3/20) tank - 1 hour (3/5) tank - 1*(3/5)/(3/20) = (3/5)*(20/3) = 4 hours