Concrete can be purchased by the cubic yard. How much will it cost to pour a slab 12 feet by 12 feet by 9 inches for a patio if the concrete costs $54 per cubic yard?

Question

anonymous · Answer

L*W*H 

54 / volume of slab

whpalmer4 · Answer

@DSS that won't get you the right answer

ashleyisakitty · Answer

I didnt think so. The answers I was getting with that were not logical.

pratyush5 · Answer

remember that the units are different. You gotta interchange into either feet or inches

whpalmer4 · Answer

You need to find the volume of the slab.  Notice that you have some unit conversions to do.  Then multiply the volume of the slab by the unit price of the concrete (again, using compatible units)

pratyush5 · Answer

@whpalmer4 is right. Just dont mess up with the units.

ashleyisakitty · Answer

I dont think I did it right.

(12/4)*(12/4)*(1/4)=9/4
(9/4)*54=121.5 

121.5 is none of my answer choices.

pratyush5 · Answer

wait let me do it .

pratyush5 · Answer

is 1944 any of your options ?

ashleyisakitty · Answer

Yes that is an option!

pratyush5 · Answer

BAZINGA :P

ashleyisakitty · Answer

Thanks :DD What did you differently than me? :x

pratyush5 · Answer

First i calculated the volume in feet. Can you do it ?

pratyush5 · Answer

calculate and tell me ?

ashleyisakitty · Answer

No, i dont think i understood how to do that. I just calculated how many times 12 would go into a yard.

pratyush5 · Answer

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