Question 313795
A reservoir has 3 sources of water. Source A can fill the reservoir in 2 days, source B in 3 days and source C in 6 days. How long would it take to fill the reservoir using all 3 sources?
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A fills 1/2 the reservoir per day
B fills 1/3 per day
C fills 1/6 per day
Add those up
1/2 + 1/3 + 1/6 = 1
= 1 res per day
--> 1 day to fill