How much should a ten year old boy weigh with his height is 140 cm?

According to the World Health Organization (WHO), the average weight for a 10-year-old boy with a height of 140 cm is 32 kg. However, it is important to note that this is just an average and there can be a wide range of normal weights for children of this age and height. Some factors that can affect a child's weight include genetics, diet, activity level, and medical conditions. If you are concerned about your child's weight, it is best to talk to a doctor.