# Maths watch

1. How do you find the height of a cuboid when you have the surface area the length and the breadth thanks
Lucy
2. Surface area of a cuboid = 2hw + 2hl + 2lw (where h is height, l is length and w is width).

If you know all of the variables except height, then you can re-arrange the equation or, more simply, input the numbers you do know and start moving numbers across the equals, if that makes sense.
3. (Original post by Fractite)
Surface area of a cuboid = 2hw + 2hl + 2lw (where h is height, l is length and w is width).

If you know all of the variables except height, then you can re-arrange the equation or, more simply, input the numbers you do know and start moving numbers across the equals, if that makes sense.

Ya that makes sense, thanks. so it is nearly like an algebra equation where when you swap things over they become the opposite?
4. (Original post by lucy101010)
Ya that makes sense, thanks. so it is nearly like an algebra equation where when you swap things over they become the opposite?
Yeah

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