Practice Exercises Java - Learn to program performing exercises with Java

Practice Exercises Java

Learn to program performing exercises with Java

12 Lessons Java with the Solutions - 228 Exercises Java with the solutions
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Float, speed units - Practice Exercises Java

Lesson 3:

Basic data types

Exercise 3.10:

Float, speed units


Create a program to ask the user for a distance (in meters) and the time taken (as three numbers: hours, minutes, seconds), and display the speed, in meters per second, kilometers per hour and miles per hour (hint: 1 mile = 1609 meters).

Source Code:

import java.util.*;
public class Main
	public static void main(String[] args)
		float distance;
		float hour, min, sec;

		float timeSec;
		float mps;
		float kph, mph;

		System.out.print("Enter distance(meters): ");
		distance = Float.parseFloat(new Scanner(;

		System.out.print("Enter timeSec(hour): ");
		hour = Float.parseFloat(new Scanner(;

		System.out.print("Enter timeSec(minutes): ");
		min = Float.parseFloat(new Scanner(;

		System.out.print("Enter timeSec(seconds): ");
		sec = Float.parseFloat(new Scanner(;

		timeSec = (hour * 3600) + (min * 60) + sec;
		mps = distance / timeSec;
		kph = (distance / 1000.0f) / (timeSec / 3600.0f);
		mph = kph / 1.609f;

		System.out.printf("Your speed in meters/sec is %1$s" + "\r\n", mps);
		System.out.printf("Your speed in km/h is %1$s" + "\r\n", kph);
		System.out.printf("Your speed in miles/h is %1$s" + "\r\n", mph);
Exercisey 3.10

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