Bath Math With Out Suction Cups Bath Maths Question Please Help?

Bath maths question please help? - bath math with out suction cups

The hot water faucet only takes 6 minutes to fill the bathtub.
The cold water has to fill 2 minutes into the bathtub.
The bath water is flushed down the drain in 4 minutes.

Are both on tap and the cap is ignored, in how many minutes you fill the tub?

Can you show me how the work is to know how and what is the answer I do not understand