Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: an author started writing a book in between 2p.m to 3p.m. He wrote exactly for 4 hrs and finished so
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Sylar (72)

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well, I guess the ques should have said about 4 hours!!! then we may have a solution!

Case 1:

if the hour hand is between 2 and 3... and the minute hand b/w 6 and 7,

then the hour hand should be between 2nd and 3rd div between 2 and 3!......(1)

Case 2:

if the hour hand is between 6 and 7... and the minute hand b/w 2 and 3,

then the hour hand should be between 1st and 2nd div between 6 and 7!......(2)

that gives us an approx start time of 2:31 PM and finish at 6:12 PM

 

PS: forget brainstorming for a while...just get two clocks and play...u'll get the soln straightaway!!! ;)

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