A) 1 h
B) 2 h
C) 3 h
D) 4 h
Correct Answer: B
Solution :
Clearly, number ' of ways of arranging 5 books \[=5!=5\times 4\times 3\times 2\times 1=120\] So, total time taken =120 min = 2 hYou need to login to perform this action.
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