# math

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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 -

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 -

The answer would be "Sally will take 3 hours to catch up with Davey."

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