Math, asked by kundankumarm6824, 1 year ago

The ratio of the diameter of two circlee is 3:7. Find the circumferences.

Answers

Answered by garrepallianjipecrle
0
Let area of first circle be A1 and second circle be A2.

Area of a circle is pie(r^2).

Let the radius of 1st circle be r1 and 2nd circle be r2.

A1/A2 = (r1)^2/(r2)^2 [ pie gets cancelled]

A1/A2 = (3)^2/(4)^2

A1/A2 = 9/16.

Hence the ratio between the areas is 9:16

Answered by apsara3
0
let the ratio be x as 3x:7x and then put it in formula circumference of circle =2 pi r ,where 2r=d
Similar questions