Final answer:
Judy spends a total of 220 minutes away from Shrewsbury.
Step-by-step explanation:
Judy catches the 12:30 train from Aberystwyth and returns 1 hour and 50 minutes later. To find the total time she spends away from Shrewsbury, we need to add the time she spends on the train going to Aberystwyth and the time she spends on the train returning to Shrewsbury.
The time she spends on the train going to Aberystwyth is 1 hour and 50 minutes. When she returns, it will take the same amount of time, so the total time she spends away from Shrewsbury is 1 hour and 50 minutes + 1 hour and 50 minutes = 3 hours and 40 minutes.
Since 1 hour is equal to 60 minutes, 3 hours and 40 minutes can be written as 3 x 60 + 40 = 180 + 40 = 220 minutes.
Therefore, the total time Judy spends away from Shrewsbury is 220 minutes.