Posted by Michelle on Sunday, April 1, 2012 at 12:21pm.
Davey reads 45 pages in an hour. Sally reads 55 pages in an hour. If Davey begins to at 2pm and Sally starts to read at 2:40pm, at what time will they be reading the same exact page?

math  Steve, Sunday, April 1, 2012 at 1:15pm
Sally reads 10 pp/hr faster than Davey.
Davey gets a 2/3 hour head start, in which time he reads 2/3 * 45 pp = 30 pp
So, it will take Sally 3 hours to catch up, putting the time at 5:40 pm. 
math  Kaka, Thursday, October 15, 2015 at 10:04pm
The answer would be "Sally will take 3 hours to catch up with Davey."