Moriel Jan 20, 2021

# Activity 2Directions Sequence the proper way of shutting down and turning off of the computer and peripheral devices by writing theumber on the blanks provideda Click OK to end your Windowsd At the bottom of the start menu Click Shut Downb. The shut-down windows dialog box appearse Select Shut down as the option sessionc The Start menu is displayedf Click the Start button​

The time for answering the question is over

Correct Question -

The circumference of two circle are in the ratio 2 : 3. Find the ratio of their areas.

Given -

Ratio of their circumference = 2:3

To find -

Ratio of their areas.

Formula used -

Circumference of circle

Area of circle.

Solution -

In the question, we are provided, with the ratios of the circumference of 2 circles, and we need to find the ratio of area of those circle, for that first we will use the formula of circumference of a circle, then we will use the formula of area of circles. We will be writing 1 equation in it too.

So -

Let the circumference of 2 circles be c1 and c2

According to question -

c1 : c2

Circumference of circle = 2πr

where -

π =

On substituting the values -

c1 : c2 = 2 : 3

2πr1 : 2πr2 = 2 : 3

=

= [Equation 1]

Now -

Let the areas of both the circles be A1 and A2

Area of circle = πr²

So -

Area of both circles = πr1² : πr2²

On substituting the values -

A1 : A2 = πr1² : πr2²

=

=

= [From equation 1]

So -

=

The ratio of their areas is 4 : 9

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