Mathematics · Mensuration
From a circular metal plate of radius 7 cm and thickness 0.16 mm, a sector is cut off containing an angle of 150°. The remaining piece is moulded into a spherical bead of radius r. What is the value of r in cm?
- 11.4
- 21.05
- 30.7✓
- 40.35
Correct answer
0.7
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