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August 5th, 2017, 11:11 AM   #1
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Tank weight

A tank (open top) has the following inside dimensions:
Length: 2 ft.
Width: 2 ft.
Depth: 1.5 ft.

It is made of 1/8 in. thick lead.

Determine weight of tank.

Assume that lead weighs .41 lbs. / cu. in.

I get ~703.76 lbs. and a headache!

Anybody agree?
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August 5th, 2017, 11:36 AM   #2
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I got ~ 1541.579 lbs

Last edited by MATHEMATICIAN; August 5th, 2017 at 12:10 PM.
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August 5th, 2017, 11:46 AM   #3
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Quote:
Originally Posted by MATHEMATICIAN View Post
I got ~ 1422.756 lbs
I say NO WAY to that!
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August 5th, 2017, 12:18 PM   #4
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I considered the bottom edges to have fillet
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August 5th, 2017, 02:36 PM   #5
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Quote:
Originally Posted by Denis View Post
I get ~703.76 lbs. and a headache!
Goofed! Should be ~120. Made stupid error...
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August 5th, 2017, 03:25 PM   #6
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Bottom plate dimensions 28 X 28 X 2 = 1568 cubic inches

Sides a and c dimensions 28 X 20 X 2 = 1120 cubic inches

Sides b and d dimensions 24 X 20 X 2 = 960 cubic inches

Total volume = 3648 cubic inches

$0.41 * 3648 \approx 1496.$

I suppose you could shave some weight by having the outside edges curved rather than sharp, but it is cocktail hour.
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August 5th, 2017, 03:35 PM   #7
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But Jeff, the weight in question is only
of the 1/8" "lead coat!", thus of the
difference in volumes....mais non?
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August 5th, 2017, 04:01 PM   #8
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Imperial measure! Heck it could be anything then
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August 5th, 2017, 05:57 PM   #9
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Quote:
Originally Posted by Denis View Post
But Jeff, the weight in question is only
of the 1/8" "lead coat!", thus of the
difference in volumes....mais non?


I took 1/8 ft

I got ~ 118.9269 lbs
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August 5th, 2017, 07:39 PM   #10
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119.159453125 lb
Thanks from Denis
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