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Doctors Medicines MCQs Q&A

  1. 123 m2
  2. 312 m2
  3. 132 m2
  4. 231 m2
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1 Answers

Option 4 : 231 m2

As we know.

Area of the circle = πr2

πr2 = 154

⇒ (22/7) × r2 = 154

⇒ r2 = 154 × (7/22) = 49

⇒ r = √49

⇒ r = 7 m

Radius of the cylinder R = 7/2 m

Height of the cylinder h = 7 m

Total surface area of the cylinder = 2πR (R + h)

= 2 × (22/7) × (7/2) × (7/2 + 7)

⇒ 2 × 11 ×

⇒ 231 m2
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