whbecomingpdm7gl whbecomingpdm7gl
  • 14-02-2019
  • Mathematics
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A rectangular pyramid measures three feet by four feet at the base, and has a height of seven feet. Find its volume. A. 21 ft3 B. 42 ft3 C. 28 ft3 D. 84 ft3

Respuesta :

MsRay
MsRay MsRay
  • 14-02-2019

Answer:

C. 28 ft³

Step-by-step explanation:

The general formula for the volume of a pyramid:

V = [tex]\frac{1}{3}Bh[/tex], where B = the area of the base and h = height of the pyramid

Since the base is a rectangle, we can find area using the formula:

A = l x w or A = 3 x 4 = 12 ft²

Using B = 12 and h = 7:

V = [tex]\frac{(12)(7)}{3}[/tex]

V = 28 ft³

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