Problem solving
PROBLEM SOLVING · IMAT Doutor1 / 1
Three taps fill a tank in 10, 15 and 30 hours respectively. All three are opened together, but after 4 hours the slowest is closed. How long in total does the tank take to fill?
A
5 hours and 12 minutes
B
5 hours
C
5 hours and 30 minutes
D
6 hours
E
6 hours and 40 minutes
Keyboard: A–E to choose, Shift + letter to cross out, Enter to confirm.