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Answer 1 · 2017-07-08T11:07:10

The mass is $=6.5kg$
The volume is $=200cm^3$

The volume of the solid cube is

$v=10*10*10=1000cm^3$

Density of iron is $rho=6.5gcm^-3$

The mass of the cube is

$m=rhov=1000*6.5=6500g=6.5kg$

-second question

Mass of piece of iron $m=1.3kg=1300g$

The volume is

$v=m/rho=1300/6.5=200cm^3$