A school backpack should weigh less then 15 % of your body weight.
It is suggested by the doctors and therapists that a person should not carry more than 10% to 15% of their body weight in their packs. Thus, the school back pack weigh according to keeping this in mind.
2 to 4 because any heavier to much pain
It depends. I am 15 and i used to weigh 109 pounds (before school). But most of my friends are much heavier and weigh 155+ pounds.
The average weight of a seventh grader's backpack typically ranges from 15 to 25 pounds, depending on the number of books, supplies, and personal items they carry. Factors such as school requirements, the use of digital devices, and individual organization can influence this weight. It's important for students to manage their load to avoid strain and discomfort. Recommendations suggest that a backpack should not exceed 10-15% of a student's body weight.
you really don't have that much books so I think a backpack is best (people might kick your roller backpack in line)
If your in High School - 130+ If your in College - 170+ but really should be 180 If your pro - 210+
i have them all andcarrying them in a backpack is a night mare so i would estimate about 30-40lbs
you should weigh about 98-104
you should weigh 85 pounds
They should weigh around 70 pounds.
The textbooks weigh 16 pounds. This is because 8 tenths of 20 pounds is 16 pounds. So, the backpack contains 16 pounds of textbooks.
you should weigh about 90-140 if your fat you must weigh 140-160