three cubes of metal with edges 3 cm , 4 cm,5 cm respectively are melted to form a single cube . find the lateral surface area of the new cube formed .
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1 cube edge is 3 cm
2 cube edge is 4 cm
3 cube edge is 5 cm
edge of the new cube formed
volume of new cube = volume of all three cubes
volume of cube = s3
33 + 43 + 53
27 + 64 + 125
216 cm3
cube root of 216 = 6
edge of the new cube formed = 6 cm
2 cube edge is 4 cm
3 cube edge is 5 cm
edge of the new cube formed
volume of new cube = volume of all three cubes
volume of cube = s3
33 + 43 + 53
27 + 64 + 125
216 cm3
cube root of 216 = 6
edge of the new cube formed = 6 cm
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