Multiple choice

Curved surface area of a cylinder is 1232 sq cm. If circumference of its base is 154 cm, then what will be the height of the cylinder? (Take π= 22/7) एक बेलन के वक्र सतह का क्षेत्रफल 1232 वर्ग सेमी. है। यदि इसके आधार की परिधि 154 सेमी. है, तो उस बेलन की ऊँचाई कितनी होगी? (π= 22/7 लीजिए)

  1. 16 cm /सेमी.

  2. 4 cm /सेमी.

  3. 8 cm /सेमी.

  4. 12 cm /सेमी.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Curved surface area of cylinder = 2πrh = 1232. Circumference 2πr = 154, so r = 154/(2π) = 24.5. Substituting: 2π(24.5)h = 1232 gives h = 8 cm. Option A is 16 cm (double the correct answer), B is too small, and D is 12 cm.

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