SOLUTION: Sara is stuck in a circular field , she knows that the area of the circular field is 100 square meters. She walks at a speed of 10 meters per minute. How long will it take her to w

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Question 1143605: Sara is stuck in a circular field , she knows that the area of the circular field is 100 square meters. She walks at a speed of 10 meters per minute. How long will it take her to walk from one end of the circular field to the other end assuming she must cross through the center?
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


The distance she must travel is the diameter of a circle whose area is 100 square meters.

A+=+100+=+%28pi%29%28r%5E2%29

r%5E2+=+100%2Fpi
r+=+10%2Fsqrt%28pi%29
d+=+20%2Fsqrt%28pi%29

time = distance/rate

%2820%2Fsqrt%28pi%29%29%2F10+=+2%2Fsqrt%28pi%29

The number of minutes it will take her to cross the field is 2%2Fsqrt%28pi%29