F.2 Maths
2008-05-11 10:11 pm
The circumference of circle A is 6π cm longer than that of circle B. Find the difference between the diameter of circle A and that of circle B.
回答 (1)
2008-05-11 10:23 pm
✔ 最佳答案
Let the radius of A and B be rA and rBThe circumference of circle A is 6π cm longer than that of circle B
2πrA-2πrB=6π
2π(rA-rB)=6π
rA-rB=3
the difference between the diameter of circle A and that of circle B
=2rA-2rB
=2(rA-rB)
=2(3)
=6
收錄日期: 2021-04-23 17:55:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080511000051KK01254