Maths help please

[mickylall]

Righto, I've tried online calculators and I'm still no clearer.If there's a simple calculation I'm buggered if I know what it is.
I'm trying to work out the volume and weight of a small pond I've built, sounds simple enough but my know it all brother in law stuck his oar in and reckons it weighs over a ton! Family honour ( well, a pint ) is on the line

The pond size in centimeters is 40 deep x 35 wide x 420

Could someone please tell me the volume of water and how much it will weigh, I have no idea and everytime I look at it all I can see is the puzzle with the girl's birthday which really made my head hurt even when I knew the answer

Please put me out of my misery

[Uriel]

40 x 35 x 420 = 588,000 cm^3 = 588L = 588kg ?

Assuming it's filled to the brim.

[CaptainVlak]

The beauty of the metric system

A cube with 10cm 'edges' is 1 litre.

So do the multiplication you have laid out. Divide by 1000 and this is the number of litres.

[Jake]

0.588 cubic meters which equals 588kg approx.

I think 😗

Jake

[thenikjones]

0.588 cubic meters which equals 588kg approx.

I think 😗

Jake

I agree with this

[catch21]

I'm getting 0.588 m3 as well so almost exactly half way between half a ton and two thirds of a ton. (The 1000kg ton not the other one.)

[mickylall]

Thanks for the replies, much appreciated.
Definitely not a ton then, that'll be a pint for me then from the know it all ass monkey

Cheers

PS for some reason the online calcs gave me 604??

[jeff]

Yup .588 m3 weighing 588kg by my reckoning too.



jeff

[PickleB]

Lest there be any confusion:

1,000 kg may be called a metric ton, but is better written as 'tonne' (t)
1 ton (UK) is 1,016 kg, so it's not too different from 1 t

[mickylall]

Thanks again and never knew this ''1,000 kg may be called a metric ton, but is better written as 'tonne' (t)''

Always thought a ton was a ton in any denomination

Cheers all

[PickleB]

Thanks again and never knew this ''1,000 kg may be called a metric ton, but is better written as 'tonne' (t)''

Always thought a ton was a ton in any denomination

Cheers all

It's just that I'm old school (pre-metric) and was taught that 20 cwt (112 lb) made a ton (2,240 pounds) etc. I well remember the coalman delivering in refillable hundredweight sacks...another thing that I suspect is long gone.

[Bristolian]

Is the pond actually straight sided then?

[mickylall]

It's an L shape with straight sides in a shaded corner built out of timber and ply lined.
I'll stick a photo up when it's finished but it looks like bit of a pig's ear at the moment

[PickleB]

From the dimensions you gave we've all assumed it's rectangular (35 cm x 420 cm) rather than L-shaped with straight (vertical) sides. Perhaps you could give us the dimensions of the 'L'?

[Kingstepper]

Thanks again and never knew this ''1,000 kg may be called a metric ton, but is better written as 'tonne' (t)''

Always thought a ton was a ton in any denomination

Cheers all

Of course there's also the US (short) ton (907kg)!

[NenoS]

40 x 35 x 420 = 588,000 cm^3 = 588L = 588kg ?

Assuming it's filled to the brim.

Problem solved.
More important is the pressure then the total weight. Every 10 cm of water produces 10 mb = 0,01 kg per cm2 in every dirtection. This data is the input for calculation and dimensioning of the bottom and side structures of the deep pools and basins. Your water is shallow so it would not be any problem.

[Glamdring]

It's just that I'm old school (pre-metric) and was taught that 20 cwt (112 lb) made a ton (2,240 pounds) etc. I well remember the coalman delivering in refillable hundredweight sacks...another thing that I suspect is long gone.

I remember the coal dumped on the path and I had to wheelbarrow half a ton to our coal house... and sweep up the path afterwards.

[PickleB]

I remember the coal dumped on the path and I had to wheelbarrow half a ton to our coal house... and sweep up the path afterwards.

I was fortunate in that there was a direct path from the road, through the garage to the coal shed (for the new "fluidised char binderless briquettes", popularly known as "Bronowski's bullets" or Homefire that went on the open fires) and an adjacent bunker (phurnacite for the kitchen stove).