Q: The height of a solid cylinder is 40 cm, and the diameter of its base is 10 cm. Two identical conical holes, each of radius 5 cm and height 12cm, are drilled out. What is the surface area (in cm²) of the remaining solid?
A.
530𝛑
B.
390𝛑
C.
450𝛑
D.
480𝛑
Correct Answer:
Option A -
Explanations:
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