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TNPSC Group-I 2017 · Question 60 of 71

A boy cut a sector of 140 degrees from a circle of radius 15 cm and folded it into a cone. What is the curved surface area of the cone (pi = 22/7)?

Aptitude

  1. A572 sq.cm
  2. B527 sq.cm
  3. C275 sq.cmCorrect
  4. D257 sq.cm

Answer: C. 275 sq.cm

Explanation

Slant height 15 cm; base radius r = 35/6 cm; CSA = pi*r*l = 275 sq.cm.

Source: TNPSC Group-I Prelims 2017 (GS1902) - Official Question Paper (scribd OCR, tick-marked answers)

← Q59View full paper (71 questions)Q61 →

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