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OpenStudy (anonymous):
In a Diennes block, (10cm *10cm*10cm), how many centimeter cubes are not visible?
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OpenStudy (anonymous):
(4*80) + (4*10) = 360 visible so 1000-360 =640 not visible.
OpenStudy (anonymous):
the answer is 416
OpenStudy (anonymous):
Duh, forgot the top and bottom:-)
OpenStudy (anonymous):
Sure it's not 512?
OpenStudy (anonymous):
thats what i got but in the answer sheet it was 416 :(
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