2006-10-21 07:36:21 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
2pi R=3.14x30=94.2
2006-10-21 07:41:48 · answer #1 · answered by Anonymous · 4⤊ 0⤋
First of all, circumference is the distance around a circle. It's found by multiplying pi (about 3.14) by the diameter, if given. If not, multiply pi by the radius times two.
So, first, think: What's 3.14*3?
It is 9.42. Then multiply that by ten. Thus, the circumference is 94.2 centimeters, or 0.942 meters!
2006-10-21 16:09:09 · answer #2 · answered by ZZ 4 · 0⤊ 0⤋
The circumference of a circle is pi times the diameter, so a circle with diameter 30cm. has circumference 30pi = 94.277796....cm.
2006-10-21 14:46:52 · answer #3 · answered by grsym 2 · 0⤊ 0⤋
Hi. As with all circles always. Pi times the diameter.
2006-10-21 14:38:46 · answer #4 · answered by Cirric 7 · 0⤊ 2⤋
That would be 30 pi cm, or 94.25 cm.
C = 2pir
since you have the diameter, you can change the formula to:
C = pi * diameter
C = pi * 30 = 94.2478
2006-10-21 14:40:46 · answer #5 · answered by Anonymous · 0⤊ 1⤋
pi times the diameter = about 94.2 cm
2006-10-21 14:43:00 · answer #6 · answered by grandpa 4 · 0⤊ 0⤋
60
2006-10-21 14:38:38 · answer #7 · answered by boohooiculooking 1 · 0⤊ 2⤋
94.2 centimeters.
(circumference of a circle =pi*diameter
circumference of a circle =3.14*30
circumference of a circle =94.2 centimeters.)
2006-10-21 15:40:06 · answer #8 · answered by Anonymous · 0⤊ 0⤋
just multiply it by 3.141592654 or pi and you'll get it's circumference. a much more accurate answer with 9 decimal places.
2006-10-21 14:42:13 · answer #9 · answered by bojinx 1 · 0⤊ 0⤋
2*pi*r
= 2*22/7*15
=94.25cm
2006-10-21 14:39:48 · answer #10 · answered by Gus 1 · 1⤊ 2⤋