Solve the equation

Question

You can paint a room in 9 hrs.  Your brother does it in 2hrs. How long does it take to work together?

write an equation for the percent of the job completed after t hours working together.

now solve the equation to determine how long it takes you and your brother to finish the job.

Answer 1

A boy can paint a room in .

His brother does it in .

Find How long does it take to work together.

Let represents the work in hours.

A boy can paint a room in hours.

His brother can do same work in hours.

Thus, together can do in the work is

Solve the equation.

A boy and his brother can paint a room in to finish the job.