From a circular sheet of paper with a radius 20 cm, four circles of radius 5 cm each are cut out. What is the ratio of the uncut to
the cut portion?

3 : 1

Step-by-step explanation:

The biggest circle has a radius of 20 cm

So that means, its area will be,

Area =

Area =

A =

=> A = 400

We do not need to solve this because it is nit required

Then, one small circle has an area of,

Area =

Area =

Area =

=> Area = 25

As there are 4 circles in, we get that the area covered by the small squares,

=>

=>

So, the amount shaded = 100/400 (We can omit the at this stage because we are finding out a ratio)

=> 1/4

So, there is 1 cut region and the remaining is the uncut region,

As we need to find uncut to cut, the ratio will be,

=> remaining : 1

=> 3 : 1

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Thanks!!

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted