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Mathematics 9 Online
OpenStudy (anonymous):

What is the first time after 4 pm the hr hand will touch the min hand?

OpenStudy (anonymous):

4:20. because the hr hand is on the 4 and the long min hand is on the 12, then hte long hand moves until it gets to the4 which represents 20 minutes

OpenStudy (anonymous):

actually it's abut 4.22pm

OpenStudy (anonymous):

y?

OpenStudy (anonymous):

because the hour hand will move a bit also

OpenStudy (anonymous):

oh, right...

OpenStudy (nottim):

..so...

OpenStudy (anonymous):

Let t be the number of revolutions that the minute hand moves clockwise from the 12 o'clock position. Solve the following equation for t:\[\frac{1}{12}t+\frac{4}{12}= t\]The LHS is the expression which calculates the position of the hour hand. When t = 0 the hour hand is at the 4/12 revolution position (4 o'clock position).The equation solution is:\[t=\frac{4}{11} \text{ revolutions} \]or 04 hr 21 min 49 sec to the nearest second.

OpenStudy (anonymous):

hahahah 2 MONTHS aGO!!

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