Question

12. The ratio of the total surface area to curved surface area of a cylinder, whose radius is 40 cm and
height is 20 cm, is:
a. 3:1
b. 2:1
C. 4:1
d. 5:1​

Answer 1

Answer:

c answer is correct one

Explanation:

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Answer 2

Answer:

a. 3:1

Explanation:

TSA= 2πr(r+h) = 2π×40(60) = 4800π sq.cm

CSA = 2πrh = 2π×40(20) = 1600π sq.cm

Ratio = TSA/CSA = 4800π/ 1600π = 3/1 = 3:1

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