two hollow spheres have charges q1,q22is earthed findq1/q2pot.diff betweenthem.

 ur question is not clear yaar i took the two sphere has same centre and has radius R₁,R₂respectively.

when a sphere is earthed the pottential at that point is 0

hence V₂-V₁=V₂=K(q₁+q₂)/R₂

cheeeerrrssss