Question #064a7
2 Answers
Explanation:
"The concrete slab will be 12 feet 9 inches long, 9 feet 3 inches wide, and 3 inches thick"
Laying out the information
- 12 feet 9 inches is
#(12\cdot12)+9# since each foot is 12 inches. This gets you#144+9=153# inches for your length. - 9 feet 3 inches is
#(9\cdot12)+3# for the same reason. This gets you#108+3=111# inches for your width. - Your height (thickness of slab) is
#3# inches.
Summarizing:
Now find the volume of the slab by using the formula
#l\cdotw\cdoth# , or#153xx111xx3=50949# cubic inches.
Converting
But the weight is 150 pounds per cubic foot, so you have to turn the inches into feet. Again, since each foot is 12 inches:
Final steps
Now to solve for weight, multiply the cubic feet weight by 150 to get your answer.
We will need to find the volume of the slab in cubic feet (
Then:
Now:
The weight of the slab is then: