Ow you're 17, than your weight is good sorry
The ideal weight is your length minus 110 cm, in your case 49 is you ideal weight.
You sound perfect..........tone up with exercise, Even walking will do that. You don't have to do anything strenuous! You're the same height as me and I'm envious.....!
i read somewhere that ideal-weight is equal to (height - 1m)..
in your case (1.60m - 1m = 60kg)
Yep..59kg is good !
According to this calculator, your weight is good for your height.
Im 1.60m tall and weight 53kg, what's your ideal weight