# Time-work-distance - Facts and Formula

## Time and Distance

Speed = Distance/Time
Time= Distance/Speed
Distance = (Speed * Time)
If the ratio of the speeds of A and B is a:b , then the ratio of the times taken by them to
cover the same distance is 1: 1

a b or b:a. 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 2xy /(x+y) km/ hr.## Time and Work

If A can do a piece of work in n days, then A's 1 day's work = (1/n).
If A's 1 day's work = (1/n),then A can finish the work in n days.
A is thrice as good a workman as B,
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a b or b:a.

Then , the average speed during the whole journey is 2xy /(x+y) km/ hr.

then: Ratio of work done by A and B = 3 : 1

Ratio of times taken by A and B to finish a work = 1 : 3.