A circular pool has radius 7.1 meters. You want to build a cement walkway all the way around it and you have enough
cement for 33 square meters. How wide can you make your walkway? Give your answer to the nearest centimeter.

Question

amistre64 · Answer

take the circomference of the pool and see what that measures

amistre64 · Answer

or...or...... you have the area of 2 circles to find, one insid ethe other

amistre64 · Answer

Area larger circle - Area smaller circle = 33

amistre64 · Answer

pi(R^2) - pi(r^2) = 33

r = 7.1

amistre64 · Answer

pi(R^2 - (7.1)^2) = 33

solve for R

anonymous · Answer

I got $$\sqrt{61}$$

amistre64 · Answer

you got?   prove it :)

anonymous · Answer

lol ok hold on

anonymous · Answer

YAYY

amistre64 · Answer

yay!!  was we right?

anonymous · Answer

YES! :)

anonymous · Answer

you are soo much more helpful than my teacher

anonymous · Answer

i learn more from you than i do form 2 hours of class

amistre64 · Answer

we must be what they wrote about when they defined genius in the dictionary :)

anonymous · Answer

lol

amistre64 · Answer

I forget more in 2 hours than I ever dreamed of learning :)