All members of our painting team paint at the same rate. If $40$ members can paint a $100$ square foot wall in $50$ minutes, then how long would it take the $40$ members to paint a $480$ square foot wall, in minutes?

Since the numbers of workers doesnt change, we can times the time by 480/100, so 50 * 4.8 = 240 minutes.

Here for better visualization:

40 members. 100 sq wall. 50 min

40 members. 480 sq wall. ?

we just times it by 4.8 to get the time.

I hope it helps!!!