M mathhelp24 New member Joined Nov 16, 2010 Messages 1 Nov 16, 2010 #1 It takes 20 minutes to cut a log into 5 equally-sized pieces. How long will it take cut a similar log into 3 equally-sized pieces? I tried a proportion 5/20 = 3/x. I solved the proportion and got x = 12 minutes. Am I right?

It takes 20 minutes to cut a log into 5 equally-sized pieces. How long will it take cut a similar log into 3 equally-sized pieces? I tried a proportion 5/20 = 3/x. I solved the proportion and got x = 12 minutes. Am I right?

S Subhotosh Khan Super Moderator Staff member Joined Jun 18, 2007 Messages 18,134 Nov 16, 2010 #2 mathhelp24 said: It takes 20 minutes to cut a log into 5 equally-sized pieces. How long will it take cut a similar log into 3 equally-sized pieces? I tried a proportion 5/20 = 3/x. I solved the proportion and got x = 12 minutes. Am I right? Click to expand... To cut a log into 5 equal pieces you need to have 4 cuts. ? each cut takes 5 minutes. To cut a log into 3 equal pieces you need to have 2 cuts. ? We need 10 minutes to cut a log into 3 equally sized pieces.

mathhelp24 said: It takes 20 minutes to cut a log into 5 equally-sized pieces. How long will it take cut a similar log into 3 equally-sized pieces? I tried a proportion 5/20 = 3/x. I solved the proportion and got x = 12 minutes. Am I right? Click to expand... To cut a log into 5 equal pieces you need to have 4 cuts. ? each cut takes 5 minutes. To cut a log into 3 equal pieces you need to have 2 cuts. ? We need 10 minutes to cut a log into 3 equally sized pieces.