The bath is filled from the hot tap in 23 minutes. Cool for 17 minutes. The boy turned on the hot tap first. When we need to turn on cool tap That the hot water at the moment of filling the bath is 1.5 times more than the cold?
split the bath into 5 parts.
2/5 will be cold water and 3/5 will be hot water.
Hot 23*3/5 = 13.8 minutes
Cold 17*2/5 = 6.8 minutes
13.8-6.8 =7 minutes
