f4 math question
2009-04-23 6:46 pm
An earthworm starts moving toward a point 1.8cm away at a pace of 1cm per minute, as it get tired, it cover only half the distance compared to previous minute in each succeeding minute How long will it take to reach its target.(correct to nearest 2 decimal place).
回答 (2)
2009-04-23 7:05 pm
✔ 最佳答案
1st min --------1cm2nd min-------0.5cm
3rd min --------0.25cm
after it left 0.05cm
the time needed is60x(0.05/0.125)= 24second
so,total time needed is 3min and 24seconds
2009-04-23 11:06:49 補充：
即 3.4 mins
參考: me
2009-04-23 7:13 pm
1 + 0.5 + 0.25 + 0.075 = 8
0.25 / 2 = 0.125
0.125 x 0.6 = 0.075
0.075 / 0.125 = 0.6
0.6 x 60s = 36s
So, the earthworm spend 3.36 min to reach its target
0.25 / 2 = 0.125
0.125 x 0.6 = 0.075
0.075 / 0.125 = 0.6
0.6 x 60s = 36s
So, the earthworm spend 3.36 min to reach its target
參考: me
收錄日期: 2021-04-13 20:08:41
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090423000051KK00374