Provide an appropriate response.
Solve the given problem: Joe has a new swimming pool in his back yard. If Joe used his hose alone it would take 40 hours to fill the pool. His neighbor, Dan, has a cistern and Dan's hose would take 60 hours by itself. If Joe uses both hoses, how long would it take to fill the pool?
A. 18 hours
B. 24 hours
C. 10 hours
D. 100 hours
Answer: B
Mathematics
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