What is the required minimum thickness (mm) of a 5m long both-end continuous, one-way slab if its steel rebar yield strength is 420? we commonly round-down the value to its nearest 10s digit, say 420.1454 becomes 420, but in this question provide the initial answer with 3 decimal places 420.145

Please use 3 decimal only and these are the units and constants use g= 9.806 m/s^2 if not given. if units are not provided, use the following: length/displacement/position=> meters time => seconds force/weight => Newton mass => kilogram temp => degrees Celsius angle => degrees speed/velocity => m/s acceleration => m/s^2