90 over 2 equals X over 5 so multiply 90 times 5 and divide it by 2... Your answer will probably be 225 pounds.
More info needed. How much does 0.4 cubic feet of what weigh? Air? Lead? Water? Dirt?
2.5 cubic feet of water weighs about: 156 pounds.
1 248.538 214 8 Pounds
Roughly 72 pounds.
The weight of 2.25 cubic feet of water is approx 4495 pounds-force (lbf).
Roughly about 30 pounds per cubic foot, so 2 cu ft is about 60 pounds
Around one hundred pounds.
There are approximately 43 pounds per cubic feet of potatoes. Thus there are 8000 X 43 = 344,000 pounds of potatoes in 8000 cubic feet.
Depends on the size of the aquarium. Water weights 10 pounds per gallon.
Cubic feet can't be converted to pounds. Cubic feet measure volume, while pounds measure mass.
It would weigh 1,342 pounds.
A cubic foot of concrete weighs ABOUT 150 pounds. 4 feet by 12 feet by 4 feet is 192 cubic feet. If you meant 4 feet by 12 feet by 4 INCHES, that would be 16 cubic feet.