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  1. The total surface area of a right circular cylinder with radius of the base 7 cm and height 20 cm, is:
    1. 900 cm²
    2. 140 cm²
    3. 1000 cm²
    4. 1188 cm²
Correct Option: D

Total surface area of right circular cylinder = 2πrh + 2πr² = 2πr (h + r)

= 2 ×
22
 × 7 (20 + 7)
7

= 2 × 22 × 27 = 1188 sq. cm.


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