Estimating paper volume via dimensions and thickness

Steps:

• Assume A4 page size: 210 mm length by 297 mm width.
• Estimate typical exam paper thickness: 0.1 mm.
• Compute area: 210 × 297 ≈ 62,000 mm².
• Calculate volume: 62,000 × 0.1 = 6,200 mm³, closest to 6,000 mm³.

Why C is correct:

• Volume formula (length × width × thickness) for standard paper yields ≈6,000 mm³.

Why the others are wrong:

• A: Far too small, equivalent to a 10 mm × 10 mm × 0.6 mm sliver.
• B: Too small, as if area were only 1/10th of actual.
• D: Too large, as if thickness were 1 mm instead of 0.1 mm.

Final answer: C