# I have got to this step and ca nnot go any further, its for an assigment and I am unsure to calculate it properly.Its to find area of cost of each of them. A = The total area is A total which...

I have got to this step and ca nnot go any further, its for an assigment and I am unsure to calculate it properly.Its to find area of cost of each of them.

A = The total area is A total which is 5.6246 m2

Total Cost is C Total. Cost of subsoil is C. Cost of sand is C sand. Cost of Rock is C Rock.Cost of Concrete is C concrete.

The fill is 1124.924 m2

C total = C Subsoil,+ C sand + C concrete + C Rock.

In my notes I put 0.5 x subsoil which is( 0.5) x fill. Fill is 11.2492 m2 This gives answer of 5.6246 m2 for Subsoil which is only 5%. I have 20% wrote down, do I use that on all, and how would I calculate each of them except subsoil.

Thanks

### 2 Answers | Add Yours

Fill=1124.924 sq m

If.

C_subsoil= .5Xfill= (.5)x(1124.924)

=562.462 sq m

This is 50% of fill

If you want 20% of fill

C_subsoil=(20/100)X(1124.924)

=224.9848 sq m

If you want 5% of fill

C_subsoil=(5/100)X(1124.924)

=56.2462 sq m

C_sand ,C_rock and C_concrete we need information ,only then we can calculate.

Please send information I do question for you.

Very sorry about this, I did not have all the infomation. Now I have,its first from 0.01x2-0.15x 0.01 x2 is x2 will not type in.

I got if right 1124.925m2 from this as total

Of A area.

50% of subsoil now in brief,told is 5% of 1124.925m2 to get subsoil = 5.6246m2.

I did not have the cost of it being 20 euro sq.metre.

Sand is 10% of the fill mix the cost is 30 euro sq.metre.

Concrete is 20% of the fill mix the cost is 80 euro sq.metre.

rock is 20% of the fill,the cost is 200 euro sq. metre.

Construct algebraic equation of above which I am unsure.

To get above 11.2492 from 0.01x2 - 0.15x

I did this by another example in class which could be wrong.

(0.01)(x2+1) - (0.15x) (x 1+1

2+1

0.01 (7.5)3 - 0.075(7.5)2

3

0.01 (22.5)3 - 0.075(15)2 - 0.01(0)2-0.075(0)2

3

0.0033(22.5) - 0.0075(15) - 0

0.0750 - 1125 - 0

= 1124.925m2

0.01 is / 3 sorry it will not type in.

Many thanks it will be a great help if you could check this

and tell me how I could calculate it with equation for the rest.

Fill=1124.924 sq m

If.

C_subsoil= .5Xfill= (.5)x(1124.924)

=562.462 sq m

This is 50% of fill

If you want 20% of fill

C_subsoil=(20/100)X(1124.924)

=224.9848 sq m

If you want 5% of fill

C_subsoil=(5/100)X(1124.924)

=56.2462 sq m

C_sand ,C_rock and C_concrete we need information ,only then we can calculate.

Please send information I do question for you.