Suppose a gas tank is in the shape of a cylinder. The tank is 20 feet long and 8 feet in diameter. Find the amount of metal used to construct the tank.
384.5 ft3
1028 ft3
602.2 ft3
1570.4 ft3

Question

Suppose a gas tank is in the shape of a cylinder. The tank is 20 feet long and 8 feet in diameter. Find the amount of metal used to construct the tank.
       384.5 ft3
       1028 ft3
       602.2 ft3
       1570.4 ft3

rajee_sam · Answer

it should be ft^2. The amount of metal is the surface area actually

anonymous · Answer

What?

rajee_sam · Answer

the units in your answers they are not correct

anonymous · Answer

Its on the problem that the teacher wrote out, so I dont think so.

rajee_sam · Answer

you ask your teacher tomorrow she will change it. P.S> Teachers can be wrong sometimes. they are humans too

anonymous · Answer

Heheh...he's right.

"Cubic feet" is a volumetric measurement. The metal used to enclose an area is a surface, and should be "square feet".

It may be just a typo on your teachers part. Hold on and I'll check.

rajee_sam · Answer

$$Surface Area of Cylinder = (2 \times \pi \times r ^{2}) + (2 \times \pi \times r \times h)$$

rajee_sam · Answer

use the data given and plug in the values in the formula and find your answer.

anonymous · Answer

I got 602.8 

How come my choice of answers only include 602.2?

anonymous · Answer

What are you using for pi?

anonymous · Answer

3.14?

anonymous · Answer

Okay, hold on...  :-)

anonymous · Answer

Isnt the radius the diameter cut in half?

anonymous · Answer

I got 602.88 using 3.14

And yes, radius is half the diameter.

anonymous · Answer

So would it be answer C?

anonymous · Answer

Yeah, I'd go with C

anonymous · Answer

BTW, I answered your last question in the other thread, too, just in case you thought I forgot about it...  :-)

anonymous · Answer

Okay, thank you:)