A single pipe can fill a tank three times faster than a second pipe. If the two pipes can fill the tank in 36 minutes while working together, the slower pipe can fill the tank in:
A. 81 min
B. 108 min
C. 144 min
D. 192 min
Answer:C
A single pipe can fill a tank three times faster than a second pipe. If the two pipes can fill the tank in 36 minutes while working together, the slower pipe can fill the tank in:
A. 81 min B. 108 min C. 144 min D. 192 min
Explanation: Allow the slower pipe to fill the tank in x minutes on its own.Then, in x/3 minutes, the quicker pipe will fill it.1/x + 3/x = 1/36,4/x = 1/36,x equals 144 minutes.