I've to work out b & d in this equasion.(adsbygoogle = window.adsbygoogle || []).push({});

I=bd^3/12

I know that the ratio between b & d in this case is 1.166 and im given the value of I.

It is an engineering problem as the software will only allow the use of square/rectangular or round section but we are using H section and we are allowed to substitue a rectangle of the same h/w ratio and moment of inertia.

This kind of thing was never what I was much good at although I believe it may be possible to work out but I dont know how.

Thanks

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# Moment of Inertia, working backwards

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