The radius of the two circular fields is in the ratio 3: 10 the area of the first field is what percent less than the area of the second?	Choose the correct answer.
A) 71%  B) 51%  C) 91%  D) 81%  E) 61%
r = 3 Ï€r2 = 9   r = 10 Ï€r2 = 100   100 Ï€ â€“ 9Ï€=91   100 ---- ? =&gt; 91%.Answer:91%
<result>C</result>
The radius of the two circular fields is in the ratio 3: 10 the area of the first field is what percent less than the area of the second?