Question

The circumference of two concentric circles are 176cm and 132cm what is the difference between their radii

Answer 1

Answer:7 cm

Step-by-step explanation:

Difference of circumference = 2

Answer 2

The difference between radii are 7 cm

Step-by-step explanation:

Circumference of circle =$2 \pi r$

The circumference of two concentric circles are 176cm and 132cm

So,$2 \pi r = 176$

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

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

r = 28

$2 \pi R = 132$

$2 \times \frac{22}{7} \times R= 132$

$R = \frac{132 \times 7}{2 \times 22}$

R = 21

Difference between their radii = 28-21 = 7 cm

Hence The difference between radii are 7 cm

#Learn more:

The circumferences of two circles are 66cm and 132cm respectively. Find the difference between their radii​

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