Question

The weight of water is 62 1/2 lb per cubic foot. What is the weight of 4 1/9 cubic feet of water?

Answer 1

use ratios of 1....

Answer 2

How do I do that

Answer 3

\[\frac{ 37/9 ft^3 }{ 1 }\frac{ 62.5 lbs }{ ft^3 } = \]

Answer 4

see the ft^3 cancels and you are left with lbs of water

Answer 5

4 1/9 = 37/9

Answer 6

ok

Answer 7

so multiply 37/9 by 62.5 to get ## lbs of water

Answer 8

I thought that was right but wasn't sure if it was the right answer

Answer 9

yes, that is why you keep track of the units, the numbers are less important

You start with 4 1/9 f^3 and you want pounds

Answer 10

\[\frac{ ft^3 }{ 1 }*\frac{ lbs }{ ft^3 } = lbs\]

Answer 11

So the answer comes out to a decimal

Answer 12

62 1/2 * 4 1/9 =

125/2 * 37/9 = 4625/18

Answer 13

or a decimal with a calculator = about 257 lbs of water

Answer 14

256.944444

Answer 15

Thanks for your help

Answer 16

your welcome, anytime