<PRE><B>Question 54920</B>
Susan and Joan are diving for golf balls in a large water trap. Susan recovers a golf ball every 0.016 hour while JOan recovers a ball every 0.025 hour. If both are working, then at what rate (in golf balls per hour) are they recovering golf balls?
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Susan DATA:
time = 0.016 hr/ball ; rate = 1000/16 balls/hr. 
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Joan DATA:
time = 0.025 hr/ball ; rate = 1000/25 balls/hr.
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Together DATA:
Susan rate + Joan rate = Together rate
1000/16 + 1000/25 = together rate
together rate = 102.5 balls/hr.
Cheers,
stan H.</PRE>