The following blocks are of the same material. Which is the heaviest one ?

The correct answer is Option 3 (C). In physics, weight is directly proportional to volume when the density (material) is constant, according to the formula: Mass = Density × Volume.

To determine the heaviest block, we must calculate the volume of each:

• Block A: 3 units × 3 units × 3 units = 27 cubic units.
• Block B: 4 units × 3 units × 2 units = 24 cubic units.
• Block C: 5 units × 3 units × 2 units = 30 cubic units.

Since all blocks are made of the same material, their density is identical. Block C has the largest volume (30 units), which mathematically results in the highest mass and, consequently, the greatest weight under gravity. Options 1 and 2 are incorrect because their calculated volumes are lower than Block C. Option 4 is incorrect as the dimensions vary significantly, leading to unequal weights.