A) 10 h
B) 12 h
C) 15 h
D) 24 h
Correct Answer: D
Solution :
Time taken to complete a revolution \[A\Rightarrow \frac{12}{4}=3\,h\] \[B\Rightarrow \frac{12}{3}=4\,h\] \[C\Rightarrow \frac{12}{3}\times 2=8\,h\] \[\therefore \] Required time = LCM of 3, 4 and 8 h = 24 hYou need to login to perform this action.
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