THE_BASE_DIAMETER_OF_A_CONICAL_HELIX_IS_100_MM._THE_ANGLE_BETWEEN_THE_BASE_AND_SLANTING_SIDE_IS_45_DEGREES._PITCH_OF_HELIX_IS_5_MM._WHAT_IS_THE_HEIGHT_OF_HELIX_AND_NUMBER_OF_REVOLUTIONS??$

• A. 50 mm, 10
• B. 25 mm, 5
• C. 30 mm, 7
• D. 100 mm, 15