Question

Diameter of the base = 14 cm, height = 8 cm
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Answer 1

Step-by-step explanation:

Given,

Diameter of the base of  the cylinder = 14cm

So, radius of the base of the cylinder = 14/2 cm =7cm

Height of the cylinder = 8cm

First case,

Curved surface area of the cylinder = 2πrh

                                                  = 2 × $\frac{22}{7}$ × 7cm × 8cm

                                                  = 352 $cm^{2}$

Total surface area of the cylinder = 2πr(r+h)

                                                        = 2 × $\frac{22}{7}$ × 7cm ( 7cm + 8cm)

                                                        = 2 × 22cm × 15cm

                                                        = 660 $cm^{2}$

Volume of the cylinder = π$r^{2}$h

                                      = $\frac{22}{7}$ × $(7cm)^{2}$ × 8cm

                                      = $\frac{22}{7}$ × 49$cm^{2}$ × 8cm

                                      = 1,232$cm^{3}$

Answer 2

Answer:

first answer is absolutely right.