Mayank explains the method to solve clock problems. Here is the summary of what is covered in the video:
Relative speed of hands
Angles in a clock
Relation between time and angle
By how many degrees does hour hand rotate from 8 in the morning to 2 in afternoon.
Angle when time is 2:20 and 2:20/11 min
Time between 2 & 3 when angle is 50 degrees?
Special Cases: Coincidence (Zero degree)
Special Cases: Opposite (180 degree)
Special Cases: Right angles (90 degrees)
General Case: Say 30 degrees
At what time between 4 and 5 o’clock will the minute-hand of a watch be 13 minutes in advance of the hour hand?
Next Class: Complicated Problems
When would three hands of a clock all overlap?
It is now past 3 o’clock in the afternoon. The minute hand is 3 minutes from now will be directly opposite the hour hand 9 minutes ago. What is the time now?
A clock is operating normally. It is now sometime between 7:00 and 8:00. In less than one hour, the minute hand and the hour hand will have exactly exchanged positions. Find the number of minutes after 7:00 that the time is now.
An absent-minded watch repairman connected the hour hand to the minute hand pinion and the minute hand to the hour hand pinion and set the clock at 6AM which was the correct time then. How soon after 6AM will this clock give the correct time again? How many times during the day would clock show correct time?
In a clock with identical dials for hours and minutes, how many times a day you can’t tell the time?
This video will be useful for students preparing for entrance exams like JEE, SAT, ACT, GATE, GMAT, GRE.
Also aspirants preparing for examinations like Bank PO, SSC, NTSE, IAS CSAT will find the concepts in this video helpful.
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