Aptitude Overflow
0 votes
19 views

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

  1. $1:3$ 
  2. $4:1$ 
  3. $3:1$
  4. $4:3$
asked in Quantitative Aptitude by (4.8k points) 38 103 167
recategorized by | 19 views

1 Answer

0 votes

Area of the circular sheet = $\pi$ * (20)2 = 400 $\pi$

Area of 4 smaller circles cut out = 4 * $\pi$ * (5)2 = 100 $\pi$

So, area of remaining paper = 300 $\pi$

$\therefore$ Ratio of the paper left to the area of the circles = 300 $\pi$ : 100 $\pi$ = 3 : 1

C is the answer.

 

answered by (1.5k points) 1 3 10

Related questions

2,724 questions
1,003 answers
393 comments
31,401 users