SOLUTION: A 0.460 inch diameter brass rod is 8'5 7/32 long. Round answers to A. and B. to 3 significant digits. A. Find the volume in cubic inches, of the rod. B.Compute the total weight

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Question 159321: A 0.460 inch diameter brass rod is 8'5 7/32 long. Round answers to A. and B. to 3 significant digits.
A. Find the volume in cubic inches, of the rod.
B.Compute the total weight of 40 rods. Brass weighs 0.300 pound per cubic inch.
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
.
A. Find the volume in cubic inches, of the rod.
Volume = ("area of base")* height
.
Since the diameter is given as: 0.460 inch
The radius is 1/2(diameter) = 0.230 inch
.
"area of base" = (pi)r^2 = (3.142)(0.230)^2 = (3.142)(0.0529) = 0.166 sq inches
"height" = 8'5 7/32 = (8*12)+5+(7/32) = 96+5+(0.21875) = 101.21875 inches
Volume then is:
0.166 * 101.21875 = 16.802 cubic inches
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B.Compute the total weight of 40 rods. Brass weighs 0.300 pound per cubic inch
That would be:
40 * 16.802 * 0.300 = 201.624 pounds