Maths question

[JumboBeef]

Can anyone help please? This is doing my head in!

A house has oil fired central heating. The oil tank is 2' wide by 6' long.

When a tenant moved in, there was 17" of oil in the tank. The deal was they would replace the oil to the same level when they moved out: there is currently 13" of oil in the tank.

However, they would like to pay the difference instead, as the minimum order of oil which can be delivered is 500 litres.

Assuming 42ppl plus VAT @ 5%, how much do they owe?

Thanks!

[Murdoc]

£47.60
Nope I was right first time....

Edited by Murdoc on Thursday 15th July 19:18

Edited by Murdoc on Thursday 15th July 19:20

[matsmith]

murdoc seems to be having trouble so il have another pop

they owe you 6912 cubic inches, according to google there are 61 cubic inches in a litre so thats approx 113 litres

113 litres at 44.1p per litre is £49.83

Im pretty sure that's right

edited for spelling

Edited by matsmith on Thursday 15th July 19:27

[Steameh]

I make it about £48


Oh is the 5% included in the 42ppl or not, if not, I didn't include the 5%



0.482386orig

0.368119new


difference 0.114261

114.261 litres

Edited to include working.

Edited by Steameh on Thursday 15th July 19:27

[ewenm]

Assuming a cuboid tank not a cylinder...

[Steameh]

ewenm said:

Assuming a cuboid tank not a cylinder...

Indeed!

[CobolMan]

Width = 2' = 2 x 12 x 2.54cm = 60.96cm
Length = 6' = 6 x 12 x 2.54cm = 182.88cm
Depth used = 4" = 4 x 2.54cm = 10.16cm
Volume used = 60.96 x 182.88 x 10.16 cm^3 = 113267.386368cm^3
1 litre = 1000cm^3 => Volume used = 113.267386368 l
1 litre = 42p + 5% VAT = 44.1p
Cost = 113.267386368 x 44.1p which is roughly £49.95

[JumboBeef]

ewenm said:

Assuming a cuboid tank not a cylinder...

Yes!

Thanks for the answer!

One last question: there will be oil used between now and moving day, so how many litres are there per 1" drop in the tank?

Thanks again.

[Digger]

Even I can work that last one out.

[JumboBeef]

Digger said:

Even I can work that last one out.

Ah! 114 litres divided by 4............

• idiot smilie*

Edited by JumboBeef on Thursday 15th July 20:21

[rlw]

fk me - thank god for electricity

[GTIR]

rlw said:

fk me - thank god for electricity

You must live down south.