Children and teenagers should be active for how long every day? -less than 10 minutes
-10-20 minutes
-30 minutes
-60 minutes​

60 mins each day

Explanation:

"Doctors recommend that teens age 13 to 18 get at least one hour of moderate to vigorous physical activity most days of the week. The minimum amount should be 30 minutes three times a week. Not all teens meet the ideal amount, but if your teen can get 30 to 60 minutes a day three or four days a week—that's a start."

Hope it helped.