X and Y, two computer engineers, built identical websites at different constant rates. X, working alone for 7 hours, built some of the website; then Y, working alone for 6 hours, built the rest of the website. How many hours would it have taken X, working alone, to build all of the website?
(1) X built one part 15 minutes
(2) X built four times as many parts in 7 hours as Y built in 6 hours
Are You Up For the Challenge: 700 Level Questions
...
(1) X built one part 15 minutes
(2) X built four times as many parts in 7 hours as Y built in 6 hours
Are You Up For the Challenge: 700 Level Questions
...
