1.

thoee (ubes each of Side丂(roqotjoined end to end nd te

Answer»

Length of each side of cube = 5 cmNow, 3 cubes are joined end to end.So, the length of the resulting cuboid will be = 5+5+5 = 15 cmBut, the breadth and height will remain the same.So, Breadth = 5 cm and Height = 5 cmSurface area of the cuboid = 2(LB + BH +HL)= 2(15*5 + 5*5 + 5*15)= 2(75 + 25 + 75)= 2*175Surface area of the cuboid = 350 sq cm



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