An earthquake was felt throughout a circular area of 1,808.64 square miles. What was the radius of the circular area?

1 Answer
Aug 5, 2016

#=> r~~23.994 m# to 3 decimal places

Taken to the nearest mile the radius is 23 miles

Explanation:

Let distance in miles be #m#
Let area be #a#
Let radius be #r#

Given:#" " a = 1808.64 m^2#

Known that #a=pir^2#

#=>1808.64=pir^2#

#=> r=sqrt(1808.64/pi)#

#=> r~~23.994 m# to 3 decimal places