http://gyazo.com/72d7bf6a9fcfaecb6f6...png?1348757685

Below is what I have completed until now but I am doing a test case and not getting the correct volume. If someone could help me out as to what I am doing wrong here it would be great.

Code:`import java.util.Scanner;`

public class A1Q4

{ /**

* Calculate the volume required to cover the track

*/

public static void main( String[] args )

{

// SET UP KEYBOARD INPUT

Scanner keyboard = new Scanner( System.in );

// DECLARE VARIABLES/DATA DICTIONARY

double rLength = 0;

double rWidth = 0;

double tWidth = 0;

double depth = 0;

double clayVolume = 0;

// Read in the given values

System.out.print ("Please enter the width of the rectangle part of the inner field in meters: ");

rWidth = keyboard.nextDouble();

System.out.print ("Please enter the length of the rectangle part of the inner field in meters: ");

rLength = keyboard.nextDouble();

System.out.print ("Please enter the width of the track in meters: ");

tWidth = keyboard.nextDouble();

System.out.print ("Please enter the desired depth of clay in centimeters: ");

depth = keyboard.nextDouble();

// Call method to compute the volume of clay needed.

clayVolume = findClayVolume (rLength, rWidth, tWidth, depth);

// Diplay the result

System.out.println ("\nThe volume of clay needed to cover the track is " + clayVolume + " cubic metres");

}

/**

* Description: include a description of the problem

* solving method (algorithm).

* Parameters (GIVENS):

*/

private static double findClayVolume(double rLength, double rWidth, double tWidth, double depth)

{

// Declaration of the result variable

double clayVolume = 0;

// Declaration of the intermediate variables

double innerTrackVolume = 0;

double wholeTrackVolume = 0;

double depthInM = 0;

// Add code for the method

// Convert the depth in m

depthInM = depth/100;

// Calculate the inner track volume

innerTrackVolume = (rLength*rWidth*depthInM) + (4/3)*(Math.PI*Math.pow((rWidth/2),3)); //*(rWidth/2)*(rWidth/2));

// Calculate the whole track volume

wholeTrackVolume = (rLength*(rWidth + 2*tWidth)*depthInM) + (4/3)*(Math.PI*Math.pow(((rWidth + 2 * tWidth)/2),3)); //*((rWidth + 2 * tWidth)/2)*((rWidth + 2 * tWidth)/2));

// Calculate the track volume by subtracting whole track from inner track

clayVolume = wholeTrackVolume - innerTrackVolume;

// Return the result

return clayVolume;

}

}