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Eight solid cubes of gold, each with an edge of 2 centimeter

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Eight solid cubes of gold, each with an edge of 2 centimeter [#permalink] New post 28 Apr 2018, 00:49
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Eight solid cubes of gold, each with an edge of 2 centimeters long, are melted together and poured into a level, rectangular-shaped bar. The dimensions of the bar are 5 centimeters by 6 centimeters, and the bar is 4 centimeters deep. How many additional cubic centimeters of liquid gold must be added to the bar so that it is completely full?

A.26
B.30
C.56
D.64
E.120
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Re: Eight solid cubes of gold, each with an edge of 2 centimeter [#permalink] New post 28 Apr 2018, 15:10
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Volume of each cube = a^3=8cm^3. volume of 8 cubes= 8*8=64cm^3. Volume of rectangular bar= lbh= 6*5*4=120cm^3. Additional cubic cms reuqired = 120-64=56cm^3
Re: Eight solid cubes of gold, each with an edge of 2 centimeter   [#permalink] 28 Apr 2018, 15:10
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Eight solid cubes of gold, each with an edge of 2 centimeter

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