Question

A tank is fitted with two taps a and

b.a can fill the tank completely in 45 minutes and b can empty the full tank in 1 hour . if both the taps are opend alternatively for 1 minutes ,then in how much time the empty tank will be filled completely

Answer 1

a tank feel completely in 45 minutes and empty in 45 minutes.So when both taps are opened so 45÷2=22.5 minutes only.