General Physics Problem - Linear Expansion (Temperature)?

E

Elaine Jane

New member
A concrete highway is built of slabs 11m long (at 23oC). How wide should the expansion cracks be (at 23oC) between the slabs to prevent buckling if the annual extreme temperatures are -30oC and 54oC?(The coefficient of linear expansion of concrete is 12x10-6 oC^-1)

Please help, so lost!! Looking for correct numerical answer and short, simple explanation. Thanks so much!!
 
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