mrs.biersackxx
  • mrs.biersackxx
A cylindrical well is 20 meters deep and has a diameter of 1.5 meters. Approximately how many cubic meters of soil were dug out to make the well? (Use π = 3.14.)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Vocaloid
  • Vocaloid
first find the radius
mrs.biersackxx
  • mrs.biersackxx
so is that half of 1.5?
Vocaloid
  • Vocaloid
yup! that gives us 0.75

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Vocaloid
  • Vocaloid
then we use the formula v = (pi)(r^2)(h) where r = 0.75 and h = 20
mrs.biersackxx
  • mrs.biersackxx
ah ok
Vocaloid
  • Vocaloid
and pi = 3.14
mrs.biersackxx
  • mrs.biersackxx
so then u multiply all of it?
Vocaloid
  • Vocaloid
yeah
mrs.biersackxx
  • mrs.biersackxx
i got 47.1
mrs.biersackxx
  • mrs.biersackxx
i think its wrong
Vocaloid
  • Vocaloid
nope, try again
Vocaloid
  • Vocaloid
v = (3.14)*(20)*(.75)^2 = ?
mrs.biersackxx
  • mrs.biersackxx
Oh i think i did something wrong
mrs.biersackxx
  • mrs.biersackxx
agh idk what im doing wrong
Vocaloid
  • Vocaloid
just multiply from left to right
Vocaloid
  • Vocaloid
(3.14)*20 = ?
mrs.biersackxx
  • mrs.biersackxx
62.8
Vocaloid
  • Vocaloid
good, now multiply that by (0.75)*(0.75)
mrs.biersackxx
  • mrs.biersackxx
35.33
mrs.biersackxx
  • mrs.biersackxx
OH I GOT IT
Vocaloid
  • Vocaloid
good, thats your final answer ~
mrs.biersackxx
  • mrs.biersackxx
thanks ur simply amazing

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