If 8 taps are needed to fill a tank in 27mins then 6 taps are needed to fill the tank in how many mins?

The reason and why it is not the opposite reason?

Thanks

8 taps fills the tank in 27 min .

1 tap will fill the tank in 27 × 8 mins. (inversely  proportionally  to each other )

6 taps will fill the tank in 27×8/6 min = 216/6 = 36 mins