how is the surface area 40cm squared

[modest bane]

what's the formula to work out the volume of a cuboid?

[minor vale]

@minor vale length x width x height

[modest bane]

yeah then you should do that to the cuboid

[minor vale]

But it says the surface area is 40cm squared

[modest bane]

yeah don't worry about that for now

what's the volume of the cuboid?

[minor vale]

Length x width x height

So do I just do that

[modest bane]

yeah work out the volume of the cuboid first

[minor vale]

16cm cubed?

[modest bane]

yeah so you have the ratio 40:16

[minor vale]

But that isn’t an option

[modest bane]

then you simplify your ratio

[minor vale]

Ohh so it’s D?

[modest bane]

yeah

[minor vale]

Thank youu

[modest bane]

you're welcome

[minor vale]

Wait what about this