Question

Circumference of the base of the cylinder is ______

(a)πr² (b) 2πr (c) 2πrh (d) πrh​

Answer 1

Answer:

(b) 2 pi r is the correct answer

Answer 2

For the circular cylinder there are the following formulas: The perimeter p is 2·Pi·r (this is the formula for the perimeter of the circle), the base area AB is Pi·r² (this is the formula for the area of a circle), the lateral surface is perimeter times height, AL = p·h and therefore AL = 2·Pi·r·h, the surface area ...