20.5 pi ie 64.4 in
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Circumference = 2pi*r 410 = 2pi*r r = 205/pi A = pi*r^2 A = pi*(205/pi)^2 A = 205^2/pi metres A = 42 025/pi metres
205/12 = 17 feet and 1 inch left over
205 x 135 = 27,675 sq inches. There are 144 sq inches in 1 sq foot therefore, 27,675 divided by 144 = 192.1875 sq feet another way to do it: convert the inches to feet to begin with by dividing them by 12 (since there are 12 inches per foot): 205 in. = 17.0833 ft. 135 in. = 112.5 ft. 17.0833 x 112.5 = 192.1871 sq feet The difference of .004 is due to rounding of 17.0833, which is actually 17.0833333...
17.9 ft x 17.1 ft = 306.1 ft^2
30 percent of 205 = 61.530% of 205= 30% * 205= 0.30 * 205= 61.5