Answer :
The rate of Ronald to do a work in a day is 1/4 of the painting. The problem can be done using ratio and proportion.
In 1 day = 1/4
It will take him 4 days to finish 1 painting.
So, it will going to take him 8 days to finish 2 whole paintings.
1/4 + 1/4 + 1/4 + 1/4 = 1 painting = 4 days
1/4 + 1/4 + 1/4 + 1/4 = 1 painting = 4 days
In 1 day = 1/4
It will take him 4 days to finish 1 painting.
So, it will going to take him 8 days to finish 2 whole paintings.
1/4 + 1/4 + 1/4 + 1/4 = 1 painting = 4 days
1/4 + 1/4 + 1/4 + 1/4 = 1 painting = 4 days