Question

the ratio of the radii of two circles is 5:7 find their circumference ​

Answer 1

Answer:

Step-by-step explanation:

The ratio of the radii of the circles = 5 : 7

Let radius of first circle = 5x

and radius of second circle= 7x

∴ Circumference of first circle = 2 πr

= 2π × 5x = 10πx                                                        

and circumference of second circle

= 2π × 7x = 14πx

∴ Ratio between their circumferences

= 10 πX : 14 πx

= 10 : 14 = 5 : 7

Answer 2

Answer:

The ratio between their circumference and area is 5: 7 and 25:49 respectively. Hence the ratio between their circumference and area is 5: 7 and 25:49 respectively.