Question

The pencil shown consists of a cylinder and a cone. Find the lateral area.

Answer 1

Cylinder lateral area: Since diameter is 6 mm, radius of pencil is 3 mm. 2pi r (h) = 2pi (3)(100) = 600 pi = 1884.955..
Now lateral area of a cone = \[\pi r \sqrt{r ^{2}+h ^{2}}\]
so pi(3) rad ((3^2 + 15^2)) = 144.17..
Add the 2 areas if the problem ask for total area of the pencil
Answer: 2029.127 mm = 202.913 cm

Answer 2

THANK YOU!

Answer 3

Glad it helps ^^

Answer 4

Oh real quick in pi what would that be?
i got 645 pi but that don't seem right

Answer 5

@study100

Answer 6

645.891 pi, so I'd around it to 646 pi.

Answer 7

ok thanks (-: