First of all, the question needs to be adjusted. Say the last number is 18' (eighteen foot).
The problem is to use the density of granite correctly. From wikipedia, we find that the density d is somewhere between 2.65 g/m^3 and 2.75 g/m^3. So let's take d = 2.70 g/m^3, the average.
Now, since 1 in = 2.54 cm and 1 ft = 12 in, we find that
1 cubic ft = 12^3 cubic in = (2.54 * 12)^3 cm^3 = 28.3 10^3 cm^3
The mass (m) equals the volume (V) times the density (d), so
m = V*d
= 216 * 28.3 * 10^3 * 2.70
= 1.65 10^7 g
= 1.65 10^4 kg
1 ton = 907 kg, so
m = 1.65 10^4/907 tons = 18.2 tons,
which is about 1% deviated from 18 tons.
Since we deviated the density for a max of about 2%, we could make a rule of thumb:
A 4' x 3' x n' piece of granite weighs n tons. Nice.
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Need to tell whether meters or centimeters or what
fifty billion dollars
No less than 130-135 no more than 160
18kt refers to the gold content of the necklace material, and 18 inch is the length. Without knowing what the link size is and the gauge of the material it is impossible to know the weight.
If we call the weight of the cat x, then the weight of the dog is 2x. We're told that the sum of the weights is 27, so 2x + x = 27. This is the same as saying that 3x = 27, so x must be 9. So the cat weights 9, the dog weighs 18.A dog and a cat together weigh 27 pounds if the dog's weight is an odd number and if he weighs twice as much as shedoes how much does each weigh?I know it isn't proper English but the cat is male (he) and the dog is female (she). So the cat weighs the 18 pounds and the dog weighs the 9 pounds so the dog has an odd number for it's weight.