Let the number of Potatoes = P
On Monday the time spent was 2 hours + 1.5*P minutes
Convert the time to make the pies into minutes = 120 minutres
Therefore on Monday the worker took
120 + 1.5P minutes
On Tuesday the worker took 2.5 hours (150 minutes) + 1minute x P
ie
150 + P minutes
We are told that the times are the same therefore
120 + 1.5P = 150 + P
subtract P from both sides of the equation
120 + 0.5P = 150
Subtract 120 from both sides of the equation
0.5P = 30
Therefore P = 30/0.5 = 60
There are 60 potatoes in the bucket.