Question

A tap can fill tank in 20 hours, while the
other can empty it in 30 hours. The tank
being empty and if both taps are opened together
how long will it take for the tank to be half full​

Answer 1

Answer:

solved

Step-by-step explanation:

let the total volume = v

in 1 hour

A will fill v/20

B will fill - v/30

both A & B will fill v/20- v/30 = v/60

the tank to be half full​ will take 30 hours