Each of Vivek, Ramesh and Bhuvan can make a whole number of doses per minute. They can make a total of 20 dosas per minute. Vivek and Ramesh 'start making dosas. After some time they leave and Bhuvan then makes some doses. In this manner, they make a total of 112 dosas in 10 minutes. The time for which Vivek and Ramesh made doses (in' minutes) is a whole number. Which of the following just cannot be the number of dosas made by Bhuvan per minute?