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  9. Q51

TNPSC Group-I 2017 · Question 51 of 71

Curved surface area of a hemisphere is 2772 sq.cm, then the total surface area of the hemisphere is

Aptitude

  1. A4158 sq.cmCorrect
  2. B3172 sq.cm
  3. C3882 sq.cm
  4. D4258 sq.cm

Answer: A. 4158 sq.cm

Explanation

2(pi)r^2 = 2772 gives r^2 = 441; total surface area 3(pi)r^2 = 4158 sq.cm.

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

← Q50View full paper (71 questions)Q52 →

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