+0  
 
0
205
1
avatar

If a mecahnic can install 12 motorss in 18 3/4 hours, how many motors should he be able to install in 28 1/8 hours?

Guest Nov 5, 2017
 #1
avatar+89775 
+1

We can solve with a proportion

 

12   / [ 18 + 3/4 ]  =   M  / [ 28 + 1/8 ]      cross-multiply

 

12 [ 28 + 1/8 ]   = [ 18 + 3/4 ] M

 

12 [ 225 / 8 ]  = [75 / 4 ] M      mutiply through by 8

 

12 * 225  =  150 M

 

2700  =  150 M     divide both sides by 150

 

18  = M   ⇒  18 motors in  28 + 1/8 hrs

 

 

cool cool cool

CPhill  Nov 5, 2017

29 Online Users

avatar
avatar
avatar
avatar
avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.