Question

A pipe can fill a tank in 7/4 hours while the other pipe can empty the full tank in 21/8 hours. Both pipes were opened at that time when the tank was 2/3 empty. How much time will be taken to fill the tank?

• A. 3 hours 20 minute
• B. 3 hours 30 minute
• C. 3 hours 45 minute
• D. 3 hours 15 minute

Answer 1

Answer: (B)