Explore basic ratios among speed, time, and distance; see how speed and time are inversely related with constant distance, and how distance varies directly with speed when time is fixed.

Practice basic speed, time, and distance concepts with worked examples on percentage changes in speed, inverse time relations, and solving for distance and on-time travel.

Apply relative speed to solve crossing and catching-up problems. The lecture analyzes two buses starting at 6:00 a.m. and 7:00 a.m. at 40 and 50 km/h, crossing at 11:00 a.m.

Discuss practical meeting point problems with practice questions, solving for meeting times and speeds from pre- and post-meeting travel data using the concepts presented in the basic session.

Explain train crossing distance: on a bridge or platform, add train length and obstacle length; on a person or pole, use train length alone; on another train, sum both lengths.

Apply linear basis to solve practical race problems, deriving total distance and speeds from head starts, gaps, and speed ratios in the practice questions.

Learn how three or more people moving on a circular track meet on the starting point or anywhere, using the least common multiple of lap times and relative speeds.

Learn how the minute and hour hands coincide every 65 5/11 minutes and oppose 11 times in 12 hours, with angles from 0 to 180 degrees.

Learn to find the angle between the clock's hour and minute hands for a given time using 360 degrees per cycle, 30 degrees per hour, and 0.5 degrees per minute.

Clock part 3 shows how to find times when a clock-hand angle is given, reviewing speeds and solving for 60 degrees after 3:00 (5 5/11 and 27 3/11 minutes).

Explore clock angle problems by finding times when the hour and minute hands form a given angle, such as 40 degrees between 4:00 and 5:00, and discuss two possible cases.