Difficulty: Medium
Correct Answer: 1306.67
Explanation:
Introduction / Context:
Removing two hemispheres of maximal size from opposite faces is equivalent to removing one full sphere whose diameter equals the cube’s side. Compute cube volume, subtract the sphere volume, and simplify.
Given Data / Assumptions:
Concept / Approach:
Volume remaining = a^3 − (4/3)πr^3.
Step-by-Step Solution:
Verification / Alternative check:
Quick check with π ≈ 3.14 yields a similar result (~1306.6), confirming consistency.
Why Other Options Are Wrong:
1556.33, 1467.33, 898.5 do not equal 2744 − (4/3)π 7^3 with π = 22/7.
Common Pitfalls:
Subtracting two hemispheres separately and rounding early, or using diameter instead of radius in the sphere formula.
Final Answer:
1306.67
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