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do you know how to find out the area of the trapezoid?
Isn't it 21+33 -------*h? 2
okay. so what is the area in your question?
well the answer to the equation I typed is 540ft^2
okay. yes, the area of the trapezoid is 540 square feet. if you are to cover 540 square feet in 3 inches of soild, how much would the volume of the soil be? remember, volume = area times height.
but isn't the area in feet and the soil in inches? so how would I convert that if I have too?
1 foot is 12 inches. so recalculate the area in terms of inches.
and tht would be multipling the area by 12 right? and I got the volume of the solid would be 19,440inches
no, you have to multiply the area by 144. because area is in SQUARE feet. a square of 1 foot by 1 foot is 1 X 1 square feet in area = 1 square feet in area. if you replece 1 foot by 12 inches, the square's area is 12 inches X 12 inches = 144 square inches.
oh okay so I got 77,760 inches. Would this be the area of the soil I'm putting down or the trapezoid and the soil?
area is not in inches. area is in square inches. so, the area of the lawn is 77760 square inches. so what is the volume of the layer of soil of height 3 inches spread out on that area?
How would you find that?
volume = area*height.
So 77760 in^2 *20=1,555,200inches^2 what do I do next?
why are you multiplying it by 20? I thought the soil was 3 inches height above the ground?
ohh okay sorry I must have spaced out there yeah it's 3 inches so I got 233,280 what do I do next?
what does the number 233,280 represent?
The area of the trapezoid with the soil on top right?
nope. remember what you were trying to calculate? remember why you multiplied the area of the trapezoid with the height of the soil?
no i don't really remember why.....sorry but this is new to me.
come on man! we were trying to calculate the volume of the soil! just scroll up and see. so, tell me what does the number 233,280 represent?
The volume of the soil?:)
yes. but in what measurement? is it cubic feet? or cubic yards? or leaves in the trees in your garden, or number of rats in new york? just giving a number doesn't tell me anything. you have to say what the number's significance is.
try again. you multiplied area, interms of inches^2, times height, in terms if inches. if you multiply inches^2 by inches, would you get inches^2 or inches^3?
okay, so the volume of the amount of soil you would have to order is 233,280 inches^3
how much is that in cubic yards? remember, one yard is 3 feet. and 1 feet is 12 inches.
Okay so I would multiple byt 12 then by 3?
that is converting 1 yard to 1 inch.
sorry, i meant. one yard = 36 inches.
so divide by 36?
nope. 1 cubic yard is 1 yard by 1 yard by 1 yard. which means 1 cubic yard is 36 inches by 36 inches by 36 inches.
So divide by 36 three times?
oh yeah okay I got it thanks SOOOOOOOOOOOO much!!<333
you are welcome.