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How many cubic yards of concrete are in a light pole caisson having a diameter of 24 inches and a
depth of 6 feet?
a. 2.09
b. 1.4
c. .7
d. 18.9

Sagot :

mhanifa

Answer:

  • C. 0.7 yd³

Step-by-step explanation:

Find the volume of cylinder:

  • V = πr²h

Convert the dimensions into yards:

  • d = 24 inches = 24/36 yards = 2/3 yards ⇒ r = 1/2d = 1/2*2/3 = 1/3 yards
  • h = 6 feet = 6/3 yards = 2 yards

Find the volume by substituting the values:

  • V = 3.14*(1/3)²*2 = 0.69777 ≈ 0.7 yd³

Correct choice is C

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