A cubic inch of PVC material weight 0.063 pounds per cubic inch. What’s the weight of a 36 inch piece of PVC pipe with an outsid
e diameter of 0.82 inches and an inside diameter of 0.75 inches?
A. 0.678 pounds
B. 0.783 pounds
C. 0.598 pounds
D. 0.814 pounds
1 answer:
Answer:
Option B. 0.783 pounds
Step-by-step explanation:
step 1
Find the area of a a 36 inch piece of PVC pipe with an outside diameter of 0.82 inches and an inside diameter of 0.75 inches
The area of a circle is equal to

we have


assume


substitute the values


step 2
Find the volume of the piece of PVC
Multiply the area by its length

step 3
Find the weight of the piece of PVC
Multiply the volume by its density
The density is 
so

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