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September 21, 2014

September 21, 2014

Posted by **Vice** on Wednesday, November 6, 2013 at 9:49pm.

M: Y:

2) A sink can be filled by a pipe in 6 minutes but it takes 12 minutes to drain a full sink. If both the pipe and the drain are open, how long will it take to fill the sink?

- Algebra -
**bobpursley**, Wednesday, November 6, 2013 at 10:11pma)

ratecombined=rateM+rateY

shed/18 = shed/(timeY-15) + shed/timeY

Y* (Y-15)=18( Y + (y-15))

y^2-15Y=36Y-270

y^2-51Y+270=0

(y-45)(Y-6)=0

y=45, M=30

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