Question

19. Three cubes of metal with edges 3 cm, 4 cm and 5 cm respectively are
meited to form a single cube. Find the lateral surface area of the new
cube formed​

Answer 1

Answer:

5. ...........

Step-by-step explanation:

.........

Answer 2

Answer:

volume of new cube =volume of (cube1+cube2+cube3)

volume of new cube =(3×3×3)+(4×4×4)+(5×5×5)

a³ =27+64+125=226cm³

a= ³√216=6cm

lateral surface area of cube =4×s²=4×6²

=4×36=144cm²

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