A) 4 min
B) 6 min
C) 5 min
D) Data inadequate
Correct Answer: A
Solution :
[a] Let it takes t minutes to completely fill the tank. Now, \[\frac{t}{6}+\frac{t}{8}+\frac{t-6}{12}=1\] or \[\frac{4t+3t+2t-12}{24}=1\] or 9t ? 12 = 24 or \[9t=36\Rightarrow t=4\,\min .\]You need to login to perform this action.
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