Question

The perimetre Of two concrentic Cirle are 176 cm and 132 cm respectively what is the difference their adii

Answer 1

Answer:Circumference of circle =2 \pi r2πr

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

So,2 \pi r = 1762πr=176

2 \times \frac{22}{7} \times r = 1762×

7

22

​

×r=176

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

2×22

176×7

​

r = 28

2 \pi R = 1322πR=132

2 \times \frac{22}{7} \times R= 1322×

7

22

​

×R=132

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

2×22

132×7

​

R = 21

Difference between their radii = 28-21 = 7 cm

Hence The difference between radii are 7 cm

Step-by-step explanation:

Answer 2

Answer:

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Step-by-step explanation:

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