Scientists discovered a circle in the desert. They walked the entire circumference and determined that the measurement was 20 miles. What is the diameter?
2006-11-21 10:41:00 · 8 answers · asked by cool_miki123 1 in Science & Mathematics ➔ Mathematics
The circumference is equal to pi*diameter
Taking pi to be 22/7(approx),
22d/7 = 20
22d = 20*7
22d = 140
d = 140/22
d = 70/11 miles
d = 6.3636363636... miles
d = 6.36 miles (approx)
2006-11-21 14:18:35 · answer #1 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 1⤋
Use the equation circumference = Pi*diameter
2006-11-21 10:45:41 · answer #2 · answered by Sean H 5 · 0⤊ 0⤋
utilising circumference = 2 x pi x radius a million. circumference = 2 x 3.14 x 4 = 25.12 feet 2. circumference = 3.14 x 10 = 31.4 yards 3. sixty 2.8 = 3.14 x d so, d = sixty 2.8 / 3.14 = 20 meters 4. section = pi x (radius)^2 = 3.14 x (5)^2 = 3.14 x 25 = seventy 8.5 sq. inches 5. section = 3.14 x (6/2)^2 = 3.14 x 9 = 28.26 sq. feet 6. 2826 = 3.14 x (r)^2 r^2 = 2826/3.14 = 900 r = 30 inches EDIT : Oh wow (the guy who replied in the past me ) your 5th ans is erroneous ...
2016-11-25 23:39:36 · answer #3 · answered by ? 4 · 0⤊ 0⤋
D=C/π
D=diameter
C=circumference
2006-11-21 10:48:27 · answer #4 · answered by Anonymous · 0⤊ 0⤋
C = 2pi*r = pi*d (where d=diameter)
So if you know the circumference, then diameter will equal C/pi.
C = pi*d
C/pi = d
C = 20
d = 20/pi = 6.366 (rounded)
.
2006-11-21 10:44:38 · answer #5 · answered by djc 3 · 0⤊ 0⤋
Apply the formula C=2 * pi * r or C = pi * D. Then D = 6.366197724.... miles
2006-11-21 10:47:45 · answer #6 · answered by BBTech 2 · 0⤊ 0⤋
cir = 2 pi r = dia x pi
circumference / pi = diameter
20 / pi = diameter
2006-11-21 10:47:03 · answer #7 · answered by Anonymous · 0⤊ 0⤋
divided the circumfrence by pi (3.14)
2006-11-21 10:49:14 · answer #8 · answered by xox_bass_player_xox 6 · 0⤊ 0⤋