how many cubic meters of earth will be removed to dig a well 2 meters in diameter and 28 meters deep?
2007-02-22 14:09:21 · 5 answers · asked by Neline 2 in Science & Mathematics ➔ Mathematics
-and tell me how you got it
2007-02-22 14:16:17 · update #1
Find the area of the circle times the depth
Rsquared x Pi x depth
1x3.14x28=87.92 cubic meters
2007-02-22 14:32:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Vol. of earth to be removed
= pi X r^2 X d
Where pi = 22/7
r = 1 met. ( because 2met. is the dia. )
d = 28 met.
Then volume = 22/7 X 1^2 X 28
= 88 Cu. met.
2007-02-22 23:41:44 · answer #2 · answered by brainy 4 · 0⤊ 0⤋
the surface area of the well (without depth) is 3.14 meters (pi x radius squared ). multiply by depth (28 meters). my answer is 87.96 cubic meters. i've been known to be wrong, but i believe this is correct.
2007-02-22 22:28:29 · answer #3 · answered by Anonymous · 0⤊ 0⤋
about 87.962 cubic meters
2007-02-22 22:15:22 · answer #4 · answered by Teeitup99 1 · 1⤊ 0⤋
1iix28=87m
radius times pie times hight
r=1
ii=3.14
h=28
2007-02-22 22:18:32 · answer #5 · answered by Anonymous · 0⤊ 1⤋