Pat, Kate and Mark charged :: Manhattan GMAT Forums

Posted: Mon Apr 28, 2008 8:16 am

Pat, Kate and Mark charged a total of 162 hours to a certain project. If Pat charged twice as much to the project as Kate and 1/3 as much time as Mark, how many more hours did Mark charge to the project than Kate?
A. 18
B. 36
C. 72
D. 90 - correct
E. 108

Please help. Thanks.

Posted: Mon Apr 28, 2008 1:43 pm

got it!

6x+2x+x = 9x = 162. solve for x. Mark has 108 and Kate has 18 so the difference is 90.

pls feel free to ignore!

Posted: Thu May 15, 2008 5:46 pm

Glad it worked out.