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Larry, Curly, and Moe are three friends who have recently bought a bookcase, which they must assemble. If Larry and Curly work together, they can build a bookcase in 2 hours. If Curly and Moe work together, they can build a bookcase in 1 2/3 hours. If Larry, Curly, and Moe all work together, they can build a bookcase in 1 hour.

If Larry and Moe work together, how long would it take them to build the bookcase?
 

 Apr 26, 2020
edited by Guest  Apr 26, 2020
 #1
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its not saying the amont of hours

 Apr 26, 2020
 #2
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1/L + 1/C =1/2,
1/C + 1/M=3/5,
1/L+1/C+1/M =1,
1/L + 1/M =1/H, solve for C,H, L,M
C =10 hours for Curly
L =2.5 hours for Larry
M =2 hours for Moe
1/2.5 + 1/2 =1/H
H =1 1/9 - hours for Larry and Moe

 Apr 26, 2020

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