2025 · Q63
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 the material weighs 2000 kg per cubic metre, then what is the weight of the material used in the construction of the box?
Elementary MathematicsMensuration
- A360 gm
- B365 gm
- C720 gm
- D730 gm
Explanation
External dimensions are 14+1 = 15 cm by 10+1 = 11 cm by 8+1 = 9 cm, accounting for the 0.5 cm sides and 1 cm bottom. Material volume = external minus internal = 15*11*9 - 14*10*8 = 1485 - 1120 = 365 cm^3. At 2000 kg/m^3 = 2 g/cm^3, the weight is 365*2 = 730 g. Hence option (d).