All questions are about this system of equations:
1 answer:
You might be interested in
Answer: d. 7 and 1/2 hours
Step-by-step explanation:
Given : The time taken by Ana and Beth do a job together = 3 hours
Time taken by Ana to do a job alone = 5 hours
Let t be the time taken by Beth to do a job .
Then, According to the question ,we have
i.e. Time taken by Beth to do a job =
Hence, the time taken by Beth to do a job alone = 7 and 1/2 hours