Question

the height of the a hallo cylinder is 7cm and its radius is 3.5 cm then the surface area is
A)231cm² B)154cm² C)308cm² D)115cm²

Answer 1

Here is your answer

Answer 2

surface area of a cylinder is 2πrh. therefore on solving we get
=2πrh
=2×22/7×7×3.5
=154