Three cubes of metal whose edges are 9, 12 and 15 cm respectively, are melted a

Question

Three cubes of metal whose edges are 9, 12 and 15 cm respectively, are melted and one new cube is made. Find the edge of the new cube?

Options:

A . 21 cm

B . 19 cm

C . 32 cm

D . 18 cm

Answer: Option D

9³
+ 12³ + 15³ = a³ => a = 18

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