Posted by John on Tuesday, August 19, 2014 at 10:34pm.
The circumference of a circle is 4 times the circumference of a circle with a radius 1 unit less. What is the radius of each circle?

Math  Reiny, Tuesday, August 19, 2014 at 10:40pm
radius of larger circle  r
radius of smaller circle  r1
circumf of large  2πr
circumf of smaller = 2π(r10
but 2πr = 4(2π(r1))
2πr = 8πr  8π
divide each term by π and rearrange equation
6r = 8
r = 8/6 = 4/3
larger has radius 4/3
smaller has radius 1/3
I will leave the checking up to you,

Math  John, Tuesday, August 19, 2014 at 10:50pm
HATS OFF ! Amazing is a less adjective for you. Thank you.
Answer This Question
Related Questions
 Algebra  The Circumference and area of a circle of radius r are givin by 2 [pie...
 Math  23.What is the approximate circumference of a circle with a radius of 6 ...
 Math  What is the approximate circumference of a circle with a radius of 6 ...
 Geometry  A circle with a radius of 1/2 ft is dilated by a scale factor of 8. ...
 triggg  Suppose a circle has a radius of 4.5 inches. If you double the radius ...
 math  I'm asked to find the circumference of a circle to the nearest tenth and ...
 math  the radius of a circle when the numeric values of the circumference and ...
 c programming  To see how the four steps of the software development procedure ...
 c# programming  To see how the four steps of the software development procedure...
 math  The area of circle c is 81 pi . if the radius of the circle is doubled, ...
More Related Questions