Maria has a 30 min. work break. During the break, she'll walk 3 minutes to another floor, say hello to 4 different friends spending equal time with each, and walk back for 3 minutes. How long can she spend with each friend?

She can spend 6minutes with each friend.

Explanation step by step:

Maria has 30 min break, she walks 3 min to another floor - we have deduct that 3 min from 30 mi

30-3=27

Than she walks 3 min back to her floor

27-3=24

She has 24 minutes left which she equally divided between 4 friends

24:4=6

6 is the answer