A collar of Styrofoam is made to insulate a pipe. Find its volume. The large radius R is to the outer rim. The small radius r is to the edge of the insulation. Use pi = 3.14 .
R=5in
r=4in
h=23in

We have been given that a collar of Styrofoam is made to insulate a pipe. We are asked to find the volume of the given pipe.

We will use volume of hollow cylinder formula to solve our given problem.

, where,

R = Radius of external cylinder,

r = Radius of internal cylinder.

h = Height of cylinder.

Upon substituting our given values in above formula, we will get:

Therefore, the volume of the pipe is 649.98 cubic inches.  

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

answer: it is d

step-by-step explanation: