 ## Time and Distance:

Speed is a very basic concept in motion which is all about how fast or slow any object moves. We define speed as distance divided by time.
Distance is directly proportional to Velocity when time is constant.
Speed Distance Time formula is mathematically written as:-

Speed = distance/time

Formula:
Distance = Speed x Time

Generally use this formula we can find the distance of any running train, car, etc. If Speed of train or car is given with time and using this multiplying these two we can find the distance covered by train. The unit of distance in kilometers, meters, miles, etc.
Speed = Distance / Time

To find the speed we can divide Distances by Time.
The unit of Speed has written infractions that are Km/hr ( written as Distance unit in numerator and Time units in the denominator ), Suppose 35 Km/hr.

Time = Distance / Speed
To find the Time we can divide the distance by speed.

If in the question is Time unit given in minute then convert it into hours divide 60 before you use the equation to find the distance in miles. and if say to find in minutes take to cover the distance in meter and speed in Km/hr then
Km / hr convert into m / sec, multiplied by 5 / 18.

### Some more Formulas

#### Few examples of Speed Time and Distance

1. B km / hr convert to m / sec = ( B x 5 / 18) m / sec.
2. B m / sec convert to km / sec =(B x 18 / 5 ) km / sec.
3. If the ratio of the speed of P and Q is p: q,   then to cover the same distances the ratio of the times taken by them is 1 / p: 1 / q, or q : p.
4. Suppose a man covers a certain distance at x km/hr and an equal distance at y km/hr. Then, the average speed during the whole journey is ( 2 x y / x + y ) km/hr.