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diff --git a/Principles_Of_Geotechnical_Engineering_by_B_M_Das/3-weight_volume_relationships.ipynb b/Principles_Of_Geotechnical_Engineering_by_B_M_Das/3-weight_volume_relationships.ipynb
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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 3: weight volume relationships"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 3.2: solved.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"//initialisation of variables\n",
+"V= 1.2 //m^3\n",
+"M= 2350 //Kg\n",
+"w= 0.086\n",
+"G= 2.71\n",
+"W= 1000 //kg/m^3\n",
+"//calculations\n",
+"R= M/V\n",
+"D= M/((1+w)*V)\n",
+"e= (G*W/D)-1\n",
+"n= e/(e+1)\n",
+"S= (w*G/e)*100\n",
+"v= (M-(M/(1+w)))/W\n",
+"//results\n",
+"printf ('moist density = % f kg/m^3 ',R)\n",
+"printf ('dry density = % f kg/m^3 ',D)\n",
+"printf ('void ratio = % 3f ',e)\n",
+"printf ('porosity = % 3f ',n)\n",
+"printf ('Degree of saturation = % 3f ',S)\n",
+"printf ('volume of water in soil sample = % 3f m^3 ',v)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 3.3: solved.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"//initialisation of variables\n",
+"n= 0.4\n",
+"G= 2.68\n",
+"w= 0.12\n",
+"R= 1000 //kg/m^3\n",
+"V= 10 //m^3\n",
+"//calculations\n",
+"d= G*R*(1-n)*(1+w)\n",
+"s= ((1-n)*G+n)*R\n",
+"M= s-d\n",
+"m= M*V\n",
+"//results\n",
+"printf ('mass of water to be added for full saturation = % f kg ',m)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 3.4: solved.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"//initialisation of variables\n",
+"d= 16.19 //kN/m^3\n",
+"w= 0.23\n",
+"W= 9.81 //kN/m^3\n",
+"//calculations\n",
+"R= d*(1+w)\n",
+"G= d/(W-d*w)\n",
+"e= w*G\n",
+"//results\n",
+"printf ('satuarated unit weight = % 2f kN/m^3 ',R)\n",
+"printf ('specific gravity = % 2f ',G)\n",
+"printf ('void ratio = % 2f ',e)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 3.5: solved.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"//initialisation of variables\n",
+"G= 2.68\n",
+"w= 0.12\n",
+"d= 1794.4 //kg/m^3\n",
+"W= 1000 //kg/m^3\n",
+"emax= 0.75\n",
+"emin= 0.4\n",
+"//calculation\n",
+"e= (G*W*(1+w)/d)-1\n",
+"D= ((emax-e)/(emax-emin))*100\n",
+"//results\n",
+"printf ('relative density of compaction in percentage = % f ',D)"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}