Bunuel wrote:

Painting at a constant rate, Lauren completes 3/5 of a job in 6 hours. How many hours will it take her to complete the job if she continues at the same rate?

A. 6/5

B. 2

C. 12/5

D. 3

E. 4

we are asked to find out the no. of hours to complete the remaining work.

If 3/5 of a job is done Remaining job = 1-(3/5)

=2/5...........Remaining portion of the work.

It is given in the question that it takes 6 hours to complete the 3/5 of job

So we can form an equation: (3/5)*x=6.....

x= 10 hours.

so entire job needs 10 hours. So, (2/5)*10 needs 4 hours.

Thus the correct answer is E.