The diagram below shows a solid cylinder.The cylinder has a diameter of 12 cm and a height of 18 cm.Calculate the total surface area of the the cylinder in cm².

                                                                   

A: 678.86 cm²

B: 701.31 cm²

C: 905.15 cm²

D: 226.29 cm²

Correct Answer : D

Surface area of a cylinder=area of two circles+Area of curved surface

Surface area of a cylinder=2(πr²)+πdh

=2×22/7×6²+22/7×12×18

=226.29+678.86

=905.15 cm²

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