Cognizant Coding Question 2021-22 | Calculate the fuel consumption of your truck.

Problem Statement 

Write a program to calculate the fuel consumption of your truck. The program should ask the user to enter the quantity of diesel to fill up the tank and the distance covered till the tank goes dry. Calculate the fuel consumption and display it in the format (liters per 100 kilometers).

Convert the same result to the U.S. style of miles per gallon and display the result. If the quantity or distance is zero or negative display ” is an Invalid Input”.

Note: The US approach of fuel consumption calculation (distance / fuel) is the inverse of the European approach (fuel / distance ). Also note that 1 kilometer is 0.6214 miles, and 1 liter is 0.2642 gallons.

The result should be with two decimal place. To get two decimal place refer the below-mentioned print statement :

Sample Input 1:

Enter the no of liters to fill the tank
20


Enter the distance covered
150

Sample Output 1:

Liters/100KM
13.33


Miles/gallons
17.64

Explanation: 

For 150 KM fuel consumption is 20 liters, 

Then for 100 KM fuel consumption would be (20/150)*100=13.33,

Distance is given in KM, we have to convert it to miles (150*0.6214)=93.21,

Fuel consumption is given in liters, we have to convert it to gallons (20*0.2642)=5.284, 

Then find (miles/gallons)=(93.21/5.284)=17.64

Sample Input 2:

Enter the no of liters to fill the tank
-5

Sample Output 2:

-5 is an Invalid Input

Sample Input 3:

Enter the no of liters to fill the tank
25

Enter the distance covered
-21

Sample Output 3:

-21 is an Invalid Input

Java Solution

package com.sw2c.coding.cts;

import java.text.DecimalFormat;
import java.util.Scanner;

public class FuelConsumptionCalculator {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		DecimalFormat decimalFotmat0_00 = new DecimalFormat("0.00");

		System.out.println("Enter the no of liters to fill the tank");
		double feulInTank = sc.nextInt();

		if (feulInTank < 1) {
			System.out.println(feulInTank + " is an Invalid Input");
			System.exit(0);
		}
		System.out.println("Enter the distance covered");
		double distanceCovered = sc.nextInt();

		if (distanceCovered < 1) {
			System.out.println(distanceCovered + " is an Invalid Input");
			System.exit(0);
		}

		double fuelPerHundred = ((feulInTank / distanceCovered) * 100);
		System.out.println("Liters/100KM");
		System.out.println(decimalFotmat0_00.format(fuelPerHundred));

		double miles = (distanceCovered * 0.6214);
		double gallons = (feulInTank * 0.2642);
		double milesPerGalon = miles / gallons;
		System.out.println("Miles/gallons");
		System.out.println(decimalFotmat0_00.format(milesPerGalon));
	}

}

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