How will we produce a curve on the edges of a solid object ?

using fillet command we can produce a curve 

use command arc and then select the corners of the solid.

i am agree with experts..................

First of all I do not understand the question but still...

Try commands  "solidedit" "chamfer" or even try create curved solid shapes over the edges of the solid in which you want to do and "subtract" from that solid..

Thanks.