Hoses A and B spout water at different constant rates, and hose A can fill a certain pool in 8 hours. Hose A filled the pool alone for the first 2 hours and the two hoses, working together, then finished filling the pool in another 3 hours. How many hours would it have taken hose B, working alone, to fill the entire pool?
Choose the correct choice from the following answers
A) 8
B) 15
C) 12
D) 6
E) 3
Since hose A can fill the pool in 8 hours, then in 2 + 3= 
<gadget id="calculator">2 + 3</gadget>
<output>5</output>
5 hours it will fill 5/8th of the pool. Thus the remaining 3/8th is filled by hose B in 3 hours. This means that hose B,working alone, to fill the entire pool will need   3*8/3= 
<gadget id="calculator">  3*8/3</gadget>
<output>8</output>
8 hours.   8nswer: 8.
<result>A</result>
Hoses A and B spout water at different constant rates, and hose A can fill a certain pool in 8 hours. Hose A filled the pool alone for the first 2 hours and the two hoses, working together, then finished filling the pool in another 3 hours. How many hours would it have taken hose B, working alone, to fill the entire pool?