Total surface area of a cylinder whose diameter is 14 cm and height 7

1.	Total surface area of a cylinder whose diameter is 14 cm and height 7 cm A) 616 cm2 B) 1884 cm2 C) 1488 cm2 D) 392 cm2
Answer» Correct option is (A) \(616\,cm^2\) Total surface area of cylinder \(=2\pi rh+2\pi r^2\) \(=2\pi r(r+h)\) \(=2\times\frac{22}7\times7\times(7+7)\) \((\because r=\frac D2=\frac{14}2\) = 7 cm & h = 7 cm) \(=44\times14\) \(=616\,cm^2\) Correct option is A) 616 cm²

Total surface area of a cylinder whose diameter is 14 cm and height 7 cm A) 616 cm2 B) 1884 cm2 C) 1488 cm2 D) 392 cm2

Answer»

Correct option is (A) \(616\,cm^2\)

Total surface area of cylinder \(=2\pi rh+2\pi r^2\)

\(=2\pi r(r+h)\)

\(=2\times\frac{22}7\times7\times(7+7)\) \((\because r=\frac D2=\frac{14}2\) = 7 cm & h = 7 cm)

\(=44\times14\) \(=616\,cm^2\)

Correct option is A) 616 cm²