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A brick measures 20 cm * 10 cm * 7.5 cm how many bricks will be required for a wall 25 m * 2 m * 0.75 m?

Correct answer: D. 25000

  • A. 24000
  • B. 23000
  • C. 22000
  • D. 25000

Explanation

The wall volume is 25 m x 2 m x 0.75 m = 37.5 m3. Each brick has volume 20 cm x 10 cm x 7.5 cm = 1500 cm3 = 0.0015 m3, so the number of bricks is 37.5 m3 / 0.0015 m3 = 25,000 bricks. The likely alternative is 24,000, option a, caused by inaccurate division or rounding.

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Area measures the surface enclosed by two-dimensional figures, while volume measures the space occupied by three-dimensional solids. Problems use formulas for rectangles, triangles, circles, prisms, cylinders, cones, spheres, and composite figures, including unit conversion and the distinction between surface area, lateral area, and volume.

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