Question

A solid iron rod has a cylindrical shape. Its height is 11 cm, and base diameter is 7cm. Then find the total
surface area.
Select one:
a
a. 324 cm2
b. 322 cm2
c. 312 cm2
d. 319 cm2​

Answer 1

Answer:

Height of cylinder is 11cm

Diameter of cylinder 7cm

Volume of cylinder πr²h

22/7×7/2*7/2×11

121/2×7=423.5

Volume of 50 such rods 50×423.5=21175cm²

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Answer 2

TSA=2πr(h+r)

2×22/7×35/10(11+3.5)

22×14.5

319cm²

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