Answer :
I believe the answer should be 270.
You should replace the “d” in 30d with a nine because the “d” stands for how many days. The question said there are nine days so you would get this...
30x9=270 minutes in total
You should replace the “d” in 30d with a nine because the “d” stands for how many days. The question said there are nine days so you would get this...
30x9=270 minutes in total