A tap can fill a tank completely in 6 hours After half the tank is filled one more similar tap is op...........

Quantitative Aptitude ( CCS) Pipes&cistern

A tap can fill a tank completely in 6 hours. After half the tank is filled , one more similar tap is opened. What is the total time taken to fill the tank completely ?

4hrs 20min

3hrs 30min

3hrs 10min

4hrs 30min

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Explanation:

Tab fill the half tank in 3hrs
Now another similar tab opened
1/6+1/6 = 2/6 = 1/3
Remaining half tank filled in 1.5hrs
Total time = 3+1.5 = 4hrs 30min

Hence, option 4 is the correct answer.