Answer:

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 multiplied by Time taken to deliver one newspaper
Time taken by first person =

Time taken by second person =

So, Total time taken can be written as:
