Answer:

Step-by-step explanation:
Given that:
4 papers are delivered by first person in one minute.
Rate of delivering one paper
or
Time taken to deliver one paper can be calculated by the formula:

Time taken to deliver one paper by first person = 
3 papers are delivered by second person in one minute.
Time taken to deliver one paper by second person = 
Total number of papers = 75
Number of papers delivered by first person = 
So, number of papers delivered by second person = (
)
Time taken to deliver
newspapers = Number of newspapers delivered <em>multiplied by </em>Time taken to deliver one newspaper
Time taken by first person = 
Time taken by second person = 
So, Total time taken can be written as:
