女儿的算术题，我也不会做，在这里请教大家！

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： 

• 脑筋急转弯？我的答案是整5小时，你女儿多大了？ -阿兹- ♀ (0 bytes) () 10/10/2009 postreply 07:59:14

• 不是脑筋急转弯，是算术题，我女儿6年级了。 -chinesejo- ♀ (0 bytes) () 10/10/2009 postreply 08:07:27

• 对于你来说,太简单了,对你女儿来讲有点急转弯。 -franckleo- ♂ (15 bytes) () 10/10/2009 postreply 08:20:43

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

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

• 记得我们小学时也做过类似的，而且不许列方程组 -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

• 我前面答案有误，自己被急转弯忽悠了一下。应该是4小时50分钟，原因见内： -阿兹- ♀ (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