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.
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
You Should Weigh in 110-140 pounds