Average height and weight for 1u7 year old teenager in terms of kilograms?

"Average" depends. "Average" varies from one region to another, and on average, American children may be a bit bigger than some countries. I have attached a growth chart depicting "average" or 50th percentile for a 17 year old girl as about 55kg. I see you live in India, and I do not have a growth chart specifically for you. But you may use this chart as a reference if it's helpful. See your doc if you're concerned!