A solid cylinder has a radius of 5 cm and a height of 10 cm. A smallest cylindrical hole of radius 3 cm is frilled coaxically through its entire length. What is the approximate volume of the remaining solid?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 502 cm3.
Volume of solid cylinder = πr2h = π × 52 × 10 = 250π cm3
Volume of hole = π × 32 × 10 = 90π cm3
Remaining volume = 250π – 90π = 160π = 160 × 3.14 ≈ 502 cm3