Given: Diameter of hemisphere = Edge of the cube =lRadius of hemisphere r=2l​Total surface area of solid = Surface area of cubical part + Closed Surface of hemisphere part - Area of base of hemispherical part=6(Edge)2+2πr2−πr2=6(Edge)2+πr2Total surface are of solid = 6l2+π×(2l​)2= 6l2+4πl2​=41​[24+π]l2 sq. units