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Two pipes can fill a tank in 30 hours and 40 hours, respectively. Find the time (in hours) taken to fill the tank when both the pipes are opened simultaneously.

A$$17\frac17$ hrs$

B$$17\frac37$ hrs$

C$$17\frac47$ hrs$

D$$17\frac27$ hrs$

Answer:

$$17\frac17$ hrs$

Read Explanation:

171717\frac17 hrs

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