Question

a square pyramid has a volume of 480 cubic inches and a height of 10 inches. what is the perimeter of the base?

Answer 1

Answer: 48 inches

Explanation:

480*3=1440

1440/10=144

each side: 12

12*4=48 inches

Answer 2

• 48 in

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The volume of a pyramid is 1/3 of the product of the base area and height.

• V = Bh/3

Find the area of the base:

• 480 = B*10/3
• B = 480*3/10
• B = 144

The base is the square, so each side is the square root of the base area:

• a = √B
• a = √144
• a = 12

The perimeter of the base is:

• P = 4a
• P = 4(12)
• P = 48