At a conference, the only events scheduled for the day are seminars and breaks. All seminars are the same length and are 10 times as long as each break. A break must be between two consecutive seminars. If the first seminar begins at 9:00 a.m. and the third one ends at 10:40 a.m., how long will the conference last if there are a total of 6 seminars that day?  Choose the correct choice
A) hours and 15 minutes	B) hours and 20 minutes	C) hours and 25 minutes	D) hours and 30 minutes	E) hours and 35 minutes
Well its like this S B S B S B S B S B S   the interval between 9 am to 10:40 am is 160 min having 3 seminars and 2 breaks .If 1 break is of 5 min than time for 3 seminars = 160 - 2*5= 
<gadget id="calculator">160 - 2*5</gadget>
<output>150</output>
150   Time of 1 seminar=150 /3= 
<gadget id="calculator">150 /3</gadget>
<output>50</output>
50 min .   So calculating for 6 seminars and 5 breaks ,total time comes out to be 5 hrs and 30 min .   Answer is hours and 30 minutes.
<result>D</result>
At a conference, the only events scheduled for the day are seminars and breaks. All seminars are the same length and are 10 times as long as each break. A break must be between two consecutive seminars. If the first seminar begins at 9:00 a.m. and the third one ends at 10:40 a.m., how long will the conference last if there are a total of 6 seminars that day?