Question

Help will medal!!!!

Kevin plans to put concrete on a rectangular portion of his driveway. The portion is 10 feet long and three inches high. The price of concrete is $98 per cubic yard. The total cost of the concrete Kevin needs is $72.59. Which of the following is closest to the width of the portion of the driveway on which Kevin plans to put concrete?

[1 foot = 12 inches; 1 yard = 3 feet]

3 feet

6 feet

8 feet

10 feet

Answer 1

@texaschic101

Answer 2

@karategirl2002

Answer 3

here

Answer 4

@SolomonZelman

Answer 5

Thanks

Answer 6

@phi

Answer 7

@hoblos

Answer 8

How about figuring out how many cubic yards of concrete you can buy?
can you do that ?

Answer 9

dang it i was going to say that lololololol

Answer 10

@NooriK.

Answer 11

I have no clue what a cubic yard is. @phi

Answer 12

look it up

Answer 13

be right back (BRB)

Answer 14

I did but im still confused on how many feet a cubic yard is

Answer 15

two things:
1) to find out how much you can buy, you don't need to know what it is.
2) it is a cube with sides all equal to 1 yard (3 ft x 3 ft x 3 ft )

Answer 16

So it would be B 6 feet

Answer 17

I don't know off hand. You "have to work the numbers"

Answer 18

how many cubic yards of concrete you can buy?

Answer 19

I cant buy a whole cubic yard because a full one is 98 dollars and I only spent 72.59

Answer 20

yes, so you get a fraction of a whole cubic yard. what do you get ?

Answer 21

@NooriK. So if I do 72.59/98 I will get the volume he needs?

Answer 22

sorry the equation i wrote was wrong
the right equation is
72.59/98= v/1 cubic yard

and yes you will get the volume

Answer 23

I did it and I got 0.7407

Answer 24

yes that's the volume in cubic yards
do you know the law of volume?

Answer 25

Yes V=LxWxH

Answer 26

next, I would change to feet (because the answer choices are in feet)
multiply your fraction of a cubic yard by 27 (3*3*3 feet is 27cu ft)

Answer 27

ok
now you have to transform the other dimension into yards
L = 10 feet = ? yards
H = 3 inchs = ? feet = ? yards
get it?

Answer 28

The length would be 3.5 and 3 inches is the height

Answer 29

3.5 yards

Answer 30

So would it be A?

Answer 31

ok, and the height is =0.085 yards

Answer 32

.765

Answer 33

then you substitute in the main law
V = L * W *H

Answer 34

you got the volume and the height and the length

Answer 35

yes I would multiply 3*0.085*3

Answer 36

no you would get
0.7407 = 3.5 * 0.085 * W
you multiply 3.5 * 0.085
and then divide 0.7407/(3.5*0.085)

Answer 37

I got 2.48

Answer 38

that's the width in yards, you have to make it in feet

Answer 39

10 feet

Answer 40

no you would get 7.44, due to uncertainty in division and multiplying, we choose the closest answer which is 8 feet

Answer 41

Oo ok I got it thank you so much for your help and spending your time to help me!!!

Answer 42

u r welcome :)

Answer 43

working in feet:
\[ \frac{ 72.59}{98}\cdot 27 = 19.999 \ cu ft \]
round to 20 cu ft of concrete

The volume of the walk is
10 feet long x 3 inches high. x W ft (W is the unknown width)
10 ft x 0.25 ft x W = 20
or W= 20/2.5 = 8 ft

Answer 44

It would be 8

Answer 45

ft