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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#