asp.net 4.0 display image in pdf file from database

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ASP.NET

PdfImage Logoleft = mydoc.NewImage(HttpContext.Current.Server.MapPath("~/college /Left_Logo.jpeg"));

mypdfpage.Add(Logoleft, 25, 25, 300);





PdfImage logoright = mydoc.NewImage(HttpContext.Current.Server.MapPath("~/college/Right_Logo.jpeg"));
mypdfpage.Add(logoright, 680, 25, 300);

i'm using this code to dispaly an image in pdf using gios.pdf library

here right logo has been displaying correctly but left logo heigt has being display largely
how to set same height and width property