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Ans, 486 c 2Example1: Three cubes of metal with edges 6 cm, 8 cm and 10 cm respectiveltoform a singte cube. Find the total surface area of the new cube formed.Solution: Fdeesofthe three cubes are a 6 cm, a2 8 cm and a3 10 cm.

Answer»

Volume of new cube = 6³+8³+10³= 216+512+1000=1728

(side)³= 1728

=> side= 12 cm

Total surface area of new cube=6side²=6(12)²=6*144= 864 cm²



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