Answer:
Time taken by Franklin to shovel alone is 65.5 minutes.
Explanation:
Let the time taken by Franklin to shovel alone = x minutes.
Since, the time taken by Angela to shovel = 180 minutes and the time taken by both = 48 minutes.
Then, we have,
Amount of shoveling done in 1 minute by Angela =

Amount of shoveling done in 1 minute by both =

Amount of shoveling done in 1 minute by Franklin=

So, we have,

i.e.

i.e.

i.e.

i.e.

i.e. x= 65.5 minutes
Thus, the time taken by Franklin to shovel alone is 65.5 minutes.