女兒的算術題，我也不會做，在這裏請教大家！

A snail is at the bottom of a bucket which is 40cm high. The snail climbs at the rate of 10cm every 50minutes. After every 50min climb the snail rests for 10mins. During the rest, the snail slips down one tenth of the total distance that he has climbed from the bottom of the bucket. How long will it take him to climb out of the bucket?

所有跟帖： 

• 腦筋急轉彎？我的答案是整5小時，你女兒多大了？ -阿茲- ♀ (0 bytes) () 10/10/2009 postreply 07:59:14

• 不是腦筋急轉彎，是算術題，我女兒6年級了。 -chinesejo- ♀ (0 bytes) () 10/10/2009 postreply 08:07:27

• 對於你來說,太簡單了,對你女兒來講有點急轉彎。 -franckleo- ♂ (15 bytes) () 10/10/2009 postreply 08:20:43

• 我不如我孩子。這蟲子每次休息就要倒回去十分之一，就把我倒的不知道什麽做了 -chinesejo- ♀ (0 bytes) () 10/10/2009 postreply 08:56:00

• 4小時45分14.7秒 -茹茜- ♀ (294 bytes) () 10/10/2009 postreply 14:24:05

• 記得我們小學時也做過類似的，而且不許列方程組 -flywhc- ♂ (174 bytes) () 10/11/2009 postreply 14:34:33

• 260 minutes (4hours and 20 minutes) -uklondon- ♂ (0 bytes) () 10/10/2009 postreply 15:23:40

• 285.245 mins -nnnttt- ♂ (153 bytes) () 10/10/2009 postreply 16:32:37

• 我前麵答案有誤，自己被急轉彎忽悠了一下。應該是4小時50分鍾，原因見內： -阿茲- ♀ (737 bytes) () 10/11/2009 postreply 02:29:04

• i think it's 4 hours and 10 minutes -Tree100- ♀ (0 bytes) () 10/11/2009 postreply 10:55:05