Question

From a circular sheet of paper with a radius of 10 cm, two circles of radius 5 cm each are cut out. What is the ratio of the uncut to the cut-out portion?​

Answer 1

Answer:

5

Step-by-step explanation:

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Answer 2

Answer:

Area of sheet of paper with radius 20 cm. =π(20)2=400π cm2

Area of 4 circles of radius 5 cm. =4×π(5)2=100π cm2

Area of remaining portion =400π−100π=300π cm2

Therefore, required ration =300π:100π=3:1