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Stairs count seconds

libinshe0072010-03-10 23:10:15 +0000 #1
President to go to a 10-story building on the 8th floor to work, as luck are catching up with electricity, elevators can not be used, he can only walk upstairs, if he is from the first layer of a climb on the 4th floor take up to 48 seconds, then ask to go the same speed how many seconds the 8th floor?
Gu Yue language2010-03-10 23:14:57 +0000 #2
1 layer climb climbed only four-layer 3-layer

so 48 / 3 = 16 seconds to 4 layers climbed to 8 layers to climb four-layer

so 4 * 16 = 64 seconds

only your question, I do not quite understand, has asked the four-layer climbed to 8 layers of time, or a layer of climb 8 layers of time?

If the latter is as long as the re-use

64 +48 = 112 seconds

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