Answer:
5 
 = 5.83 minutes
 = 5.83 minutes
or
5 minutes 50 seconds
Explanation:
Given: You have been cleaning diesel dispensers for 35 minutes. You have completed 6 dispensers. 
Here we need to find the unit rate.
Here the unit rate represents time taken to clean 1 diesel dispensers.
Unit rate = 

= 

= 5 

Now we can convert 
 minutes to seconds
minutes to seconds
1 minute = 60 seconds

= 5*10 seconds
= 50 seconds
Therefore, to clean 1 diesel dispenser you need 5 minutes 50 seconds.