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2014-08-19T13:13:45+05:30

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One lecture duration : 1 1/2 hrs = 1.5 hours  or 3/2 hours

Total course duration = 30 hours

Number of lectures * duration of each lecture = total course duration

number of lectures = total course duration / duration of each lecture
                           =  30 hours / (3/2) hours  =   30 * 2/3  = 60/3 = 20

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2014-08-19T13:18:06+05:30
Time for 1 evening course = 1.5 hr
Total course duration = 30 hr
Total lecture classes = 30/1.5
= 20 classes
(D) 20


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