A) ??????????? ?80???????????? ?????????????????
B) ??????????? ?87
C) ??????????? ?89???????????? ?????????????????
D) ??????????? ?90
Correct Answer: C
Solution :
?There are 9 columns containing 5 cubes each, 7 column of 4 cubes each and 5 columns containing 3 cubes each and 1 column with 1 cube. \[\therefore \]? Total cubes \[=9\times 5+7\times 4+5\times 3+1=89.\]
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