# Cat tricks and shortcuts

We have compiled time and distance concepts and formulas for you in this section. We have also given how we derive each of these formulas. They should surely help you crack any aptitude test on time and distance. To enhance your knowledge and skills to solve Time and Distance aptitude test problems, go through the tutorial on Time and Distance.

Most of the aptitude questions on time and distance can be solved if you know the basic correlation between speed, time and distance which you have learnt in your high school class. Speed is distance covered by a moving object in unit time. Let the distance travelled by them are `D_a` and `D_b` respectively and time taken to cover these distances be `T_a` and `T_b` respectively. We know that when distance travelled is constant, speed of the object is inversely proportional to time taken. While answering multiple choice time and dinstance problems in quantitative aptitude test, double check the units of values given. Average speed is always equal to total distance travelled to total time taken to travel that distance. Two persons A and B start at the same time from two points P and Q at the same time towards each other.

They meet at a point R and A takes `t_a` time to reach Q and B takes `t_b` time to reach B. If speed of A and B are `S_a` and `S_b` respectively. Time taken by A to cover PR is same as time taken by B to cover QR. We know that when time is constant, speed is directly proportional to distance covered. Both equations are valid even if A and B start at 2 different times from P and Q towards each other where A takes `t_a` time to reach R and B takes `t_b` time to reach R. Two persons A and B start at the same time from two points P and Q at the same time towards each other with speeds `S_1` and `S_2` respectively. They reach their respective destinations and reverse their directions.

They continue this to and fro motion. After meeting, they continue to Q and P respectively. When they reach their destinations, they have together covered 2D distance. By the time they meet for second time, they will have covered 3D distance. Total distance covered by A and B for their 3rd meeting is 5D. Got a tip or Question? Subscribe to our weekly Newsletter and receive updates via email.
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