Question

7. The ratio of the radius of two circles is 5:3. Find the ratio of their circumferences ​

Answer 1

Step-by-step explanation:

circumference of circle is =2πr ( r is radius)

circumference 1 /circumference2 = r1/r2

5/3 (given)

so ratio of their circumference is 5:3

Answer 2

Answer:

given,

radius of two circle= 5x and 3x

to find,

ratio of their circumferences = ?

solution,

1st we will find the circumference of 1st circle,

circumference of circle = 2πr

2×22÷7×5

31.4285714286

now we will find the circumference of 2nd circle,

circumference of circle = 2πr

2×22÷7×3

18.8571428571