Question

3. Two taps X and Y can fill a tank in 9 hours and 6 hours respectively. If both of them are opened
gether, how long will they take to fill the tank completely?​

Answer 1

9+6/2= 15/2= 7.5... 7 hours and 30 min

Answer 2

Answer:

x tap can fill a tank in one hour = 1/9

and y tap = 1/6

They take to fill the tank completely = x + y ,

1/9 +1/6 = 5/18 hours.... is answer of this