Candy and Tim share a paper route. It takes Candy 70 minutes to deliver all the papers, and it takes Tim 80 minutes. How long does it take them to deliver all the papers when they work together?

Time is the seemingly irreversible succession of existence and events that occur from the past, through the present, and into the future.
It is a component quantity of various measurements used to sequence events, compare the duration or intervals between events, and quantify rates of change of quantities in material reality or conscious experience.

To find how long it takes the two when they work together:

Let x represent the amount of time it takes them to complete the paper route together.
This means that in one minute, they can complete 1/x of the paper route.
Candy can complete 1/70th of the route in 1 minute and Tim can complete 1/80th of the route in 1 minute.
The part Candy can do in one minute + the part-time can do in one-minute equals the part they can do together in one minute:
1/70 + 1/80 = 1/x

Because the LCD has a resolution of 560x, multiply both sides of the equation by 560x:

Therefore, it will take 37.3 minutes if they will work together.

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