document.write( "Question 774674: If 4 men and 6 boys can finish a piece of work in 24 days, in what time will 8 men and 9 boys finish it supposing that 8men can do as much work in 16 hours as 24boys can do in 12hours?
\n" ); document.write( "A.12 days B.13 1/3 days C.15 days D.12 1/2 days
\n" ); document.write( "

Algebra.Com's Answer #472411 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
If 4 men and 6 boys can finish a piece of work in 24 days,
\n" ); document.write( "Find the number of men and boy days to complete the work
\n" ); document.write( "24(4m) + 24(6b) = (96m + 144b)
\n" ); document.write( ":
\n" ); document.write( "in what time will 8 men and 9 boys finish it supposing that
\n" ); document.write( ":
\n" ); document.write( "8 men can do as much work in 16 hours as 24 boys can do in 12 hrs?
\n" ); document.write( "16(8m) = 12(24b)
\n" ); document.write( "128m = 288b
\n" ); document.write( "simplify, divide both sides by 32
\n" ); document.write( "4m = 9b
\n" ); document.write( "m = \"9%2F4\"b
\n" ); document.write( "m = 2.25b
\n" ); document.write( ":
\n" ); document.write( "(96m + 144b) = the completed job
\n" ); document.write( "replace m with 2.25b
\n" ); document.write( "96(2.25b) + 144b =
\n" ); document.write( "216b + 144b = 360 boy-days to complete the job
\n" ); document.write( ":
\n" ); document.write( "\"in what time will 8 men and 9 boys finish it
\n" ); document.write( "let t = number of days to do the job
\n" ); document.write( "8t + 9t = completed job
\n" ); document.write( "Change 8 men to boys: 8*2.25 = 18
\n" ); document.write( "18t + 9t = 360
\n" ); document.write( "27t = 360
\n" ); document.write( "t = 360/27
\n" ); document.write( "t = 13.33 days for 8 men and 9 boys to do the job
\n" ); document.write( "
\n" );