6x+7when x =5? 6+5=11+7=18
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Answer: Time taken by pipe C to empty the tank = 5 hours.
Step-by-step explanation:
Pipe A can fill a tank in 5 hours.
Let time taken by Pipe C = x ( hours)
Time taken by Pipe B = x-2 ( hours)
Now, with all 3 pipes open, it takes 3 hours to fill the tank, it can be represented as
Time cannot be negative,
So, x=5
Thus, Time taken by pipe C to empty the tank = 5 hours.