A solid cylinder (radius 6 cm) has five cylindrical holes (radius 1.5 cm each) drilled throughout its length. Approximately what percent of volume is removed?

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (D) 31.25%

ব্যাখ্যা

5 × 1.5² / 6² = 11.25/36 = 31.25%.