pi x r squared
pi x 25 squared
pi x 125
= 392.6990817
393/2
=196
what am i doing wrong. my text book says 128.5
2006-12-06 10:07:46 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
hey 25 square is 625 not 125
2006-12-06 10:14:11 · answer #1 · answered by niel_alinda 3 · 0⤊ 0⤋
You find the area of the 50 m diameter circle and divide that by two. Area of 50 m diameter circle = pi x diameter x diameter / 4 = 3.1416 x 50 x 50 / 4 = 1963 square meters. Divide this by two to get 981.7 square meters. Your text book answer is wrong.
Alternatively, area of 50 m diameter circle = pi x radius x radius = 3.1416 x 25 x 25 = 3.1416 x 625 = 1963 square meters. Divide this by two to get 981.7 square meters. Again, your text book answer is wrong.
2006-12-06 18:24:03 · answer #2 · answered by hevans1944 5 · 0⤊ 0⤋
25 squared is not 125. It's 625.
2006-12-06 18:16:21 · answer #3 · answered by Anonymous · 0⤊ 0⤋
oops 25^2 is 625 and not 125
2006-12-06 18:12:20 · answer #4 · answered by raj 7 · 0⤊ 0⤋
25^2=625
2006-12-06 18:12:08 · answer #5 · answered by csferrie 2 · 0⤊ 0⤋
25 squared = 25 * 25 = 625
(pi * 625) / 2 = 981.747704
your book is wrong or you stated the problem wrong
2006-12-06 18:10:23 · answer #6 · answered by DanE 7 · 0⤊ 0⤋
Your text book answer is for the circumference, not the area.
C = (pi x 25) + 50
2006-12-06 18:14:13 · answer #7 · answered by panenka_chip 2 · 0⤊ 0⤋
should be roughly 981.7 m^2
2006-12-06 18:15:44 · answer #8 · answered by Anonymous · 0⤊ 0⤋