Question

the circumference of two concemtiric circle are 176 M and 132 m respective. the difference between their radii is a.5m b.7m c.8m d. 44m​

Answer 1

Answer:

7

Step-by-step explanation:

$176 = 2\pi \: r1 \\ r1 = \frac{88}{\pi} \\ 132 = 2\pi \: r2 \\ r2 = \frac{66}{\pi} \\ r1 - r2 = \frac{88}{\pi} - \frac{66}{\pi} \\ = \frac{22}{22} \times 7 = 7$

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Answer 2

given, circumference of one circle is 176 m and 132 m .

radii of of first cirlce circles , $2\pi r = c$

==> $2\frac{22}{7 } r = 176$

==> $r= \frac{(176)(7)}{44}$

==> r = 28 m

radius of other cirlce is , $2\pi r = c$

==> $2\frac{22}{7} r = 132$

==> $r= \frac{(132)(7)}{44}$

==> r = 21  m

difference beetween their radii is.....  

==> 28 - 21

==> 7m