P.6 Maths Questions

2007-04-24 1:57 am
1) Circumference of a circle is 6.28 cm longer than that of another circle. Find the difference between their radii (Take pi as 3.14)\\

2) If the ratio of the diameters of two circles is 3:4. Find the ratios of their circumferences

回答 (1)

2007-04-24 2:06 am
✔ 最佳答案
1
Circumference=2r(pi)
6.28=2(pi)
The difference=2cm

2
Circumference=2r(pi)
ratio of the diameters of two circles is 3:4.
=3(pi):4(pi)=3:4


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