2025 · Q64
Consider the following for the next two (02) items that follow: 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. If water weighs 1000 kg per cubic metre, then what is the weight of the box with water?
Elementary MathematicsMensuration
- A1·850 kg
- B1·900 kg
- C2·050 kg
- D2·100 kg
Explanation
Inner volume = 14×8×10 = 1120 cm³; outer dimensions 15×11×9 give 1485 cm³, so the material is 365 cm³ weighing 365×10⁻⁶×2000 = 0.73 kg. The water weighs 1120×10⁻⁶×1000 = 1.12 kg, for a total of 1.85 kg, option (a).