Aptitude

12 flashcards · Other · by Rahul Verma

1. Two bodies are moving in opposite directions at speeds S1 and S2 respectively. The relative speed is defined as

   s1+s2

2. Two bodies are moving in the same direction then relative speed is defined as

   s1-s2

3. Train crossing a stationary object without length:

   s*t= len(t)

4. Train crossing a stationary object with length:

   s*t=len(t)+len(o)

5. Train crossing a moving object without length: • In opposite direction:

   speed of train + speed of object *time= length of train

6. Train crossing a moving object without length: • In same direction:

   speed of train - speed of object * time = length of train

7. Train crossing a moving object with length: • In opposite direction

   speed of train + speed of object * time = lenghth of train + length of object

8. Train crossing a moving object with length: • In same direction

   speed of train - speed of object * time = lenghth of train + length of object

9. While moving upstream (or against the flow of the water), the speed of movement is given by

   speed of upstream = speed of boat - speed of stream

10. While moving downstream(or with the flow of the water), the speed of movement is given by

    speed of downstream = speed of boat + speed of stream

11. The relative speed of two bodies moving around a circle in the same direction is taken as

    s1-s2

12. when two bodies are moving around a circle in the opposite direction, the speed of the two bodies is taken to be

    s1+s2