A given cylinder has a radius of 7 cm and a height of 15 cm.The cylinder has one of its end open and the other closed. Calculate its surface area.

A: 1397 cm²

B: 1320 cm²

C: 814 cm²

D: 101 cm²

Correct Answer : C

An open tank has one circular surface closed and one open

Therefore,

Surface area of the cylinder=area of one circles+Area of curved surface

Surface area of the cylinder=(πr²)+πdh

Area=22/7×7×7+22/7×14×15

=154+660

=814 cm²

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