Each of 10 machines works at a constant rate to do a certain job. The amount of time needed by the 10 machines working together is 16 hours.
How many hours would be needed if only 8 machines, working together, were used to complete the job?
Answer is 20
How did they get this answer???
How many hours would be needed if only 8 machines, working together, were used to complete the job?
Answer is 20
How did they get this answer???
