If the material weighs 2000 kg per cubic metre, then what is the weight of the material used in the construction of the box?
Consider the following for the next two (02) items that follow :<br>The sides of an open box are 0.5 cm thick and bottom is 1 cm thick. The internal length, breadth and depth are respectively 14 cm, 10 cm and 8 cm. It is completely filled with water.
- A. 360 gm
- B. 365 gm
- C. 720 gm
- D. 730 gm ✓
Correct Answer: D. 730 gm
Explanation
External dimensions are L = 14+1 = 15 cm, B = 10+1 = 11 cm, and H = 8+1 = 9 cm. External volume = 15 \times 11 \times 9 = 1485 cm^3. Internal volume = 14 \times 10 \times 8 = 1120 cm^3. Material volume = 1485 - 1120 = 365 cm^3. Density is 2 g/cm^3, so weight = 365 \times 2 = 730 gm.
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