John can paint a fence in 9 hours. tim can paint the same fence in 11 hours. how much time would the two working together need to paint the same fence? (round your answer to the nearest hundredth.)

Question

24-05-2018
Mathematics

contestada

John can paint a fence in 9 hours. tim can paint the same fence in 11 hours. how much time would the two working together need to paint the same fence? (round your answer to the nearest hundredth.)

Respuesta :

Otras preguntas

In the energy payoff phase of glycolysis, both atp and nadh are formed. What purpose do each of these molecules serve in the cell?

The volume of the oceans on Earth is approximately 1,386 million km^3. As the Earth's temperature rises, the ice in the polar icecaps melts into the oceans, inc

Among the great masters of relief sculpture were the ____________, who often decorated the walls of their temples and burial complexes with intricate raised rel

Activities that focus on getting the right amount of the right products to the right place at the right time at the lowest possible cost is referred to as _____

what is true friendship ?

In the context of framing health messages for changing health habits, messages that emphasize problems seem to work better for health behaviors that:____.

Which is an advantage of tax-deferred retirement savings?

What are the main reasons why society is gradually changing?

Pls Help! A sample of seawater from a tidal estuary was found to contain a concentration of 727 mg of chloride ion per kg of seawater. If the density of the sam

_____ is designed to prevent illegal distribution of movies, music, and other digital content?

calculista calculista · Answer 1 · 2018-06-02T15:30:05+02:00

we know that

John can paint a fence in 9 hours
so
100%----------> 9 hours
X--------------> 1 hour
x=100/9-----> 11.11%
that means that in 1 hour john paint 11.11% of the fence

Tim can paint a fence in 11 hours
so
100%----------> 11 hours
X--------------> 1 hour
x=100/11-----> 9.09%
that means that in 1 hour Tim paint 9.09% of the fence

John and Tim in 1 hour can paint (11.11%+9.09%)-----> 20.2 %
so
20.2%---------> 1 hour
100%--------> X
x=100/20.2-----> x=4.95 hours

the answer is
4.95 hours