Thread: Working out the height of a Cuboid

Hiya guys, im taking an early GCSE in november and i just need to clear a few things up.

How do i work out the height of a cuboid. The question is as follows:

The Cuboid has a volume of 180cm3.
Calculate the height of the cuboid

Length = 8cm
Width = 5cm

I sort of thought that length x width but that would give you the area and i want the height , Or am i right?



Also another question i need help out is working out the volume.

Use the approximations to estimate the volume of the cuboid.

Height = 9.89CM
Width = 20.3 CM
Length = 29.7CM

To approximations i would say

Height = 10CM
Width = 20CM
Length = 30CM

For volume is it x them all together?
10x20x30 ?

Thanks

The volume of a cuboid is given by:



The other one seems right to me.

Hiya

Thanks for your swift reply. So the first one my theory is correct? I'll do (height) , But im sure ?

Not quite. Take the formula I gave you and substitute the values.





What does h become?

8x5 = 40
So i gotta see how many times 40 goes into 180 which is 4.5 , so would it be 4 or 5 , or just 4.5 ?

You leave it as 4.5 cm, unless the question asks you to round off to one figure.

Well done!