Azzuro79 wrote:I know this gonna be easy for you guys lets say we have 2 barrels , A & B ....Barrel A is 49cm long, 60cm Height and 68 cm in diameter while barrel b is 37cm long, 45cm height and 51cm in diameter could u guys help me how to get weight of each barrel in KG.
First a bit of confusion with your dimensions - A cylinder is defined by two, and you've given three... I'm going to pluck out the two that we need, the height, and the radius. I'm not sure where the length came from, and I'm not sure how to create a barrel that looks like what your describing.
I'll set barrel "A" as 60 cm in height, with a diameter of 68 cm - that gives us a radius of 1/2(diameter) or 34 cm, and barrel "B" as 45 cm in height and 51 cm in diameter which give a radius of 25.5 cm.
The volume of a cylinder is calculated using ðR²(H), so:
Barrel A: 3.1415(34 cm)²(60 cm) = 3.1415(1156 cm²)(60 cm) = 217,894.44 cm³, or 217.89 liters
Barrel B: 3.1415(25.5 cm)²(45 cm) = 3.1415(650.25 cm²)(45) = 91,924.22 cm³, or 91.92 liters.
Calculating the Volume of these barrels was easy. Your next question, what is their weight, is a more difficult problem.
If the Barrels are full of water, which weighs one kilogram per liter, then the barrels weigh 217.89 Kilograms and 91.92 kilograms respectively.
If the Barrels are full of lead, which weights 11.3 kilograms per liter, then they weigh 2,462,207.2 kilograms and 1,038.7 Kilograms respectively.
You'll have to know what is in the barrels, as well as its density in g/cm³ (or kg/liter) in order to calculate its weight.