Question

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 1

Answer:

$$17\frac17$ hrs$

$17\frac17$ hrs