Average Speed - Java

A single line L with a set of space separated values indicating distance travelled and time taken is passed as the input. The program must calculate the average speed S (with precision upto 2 decimal places) and print S as the output. 

Note: The distance and time taken will follow the format DISTANCE@TIMETAKEN. DISTANCE will be in kilometers and TIMETAKEN will be in hours. 

Input Format: The first line contains L. 

Output Format: The first line contains the average speed S. 

Boundary Conditions: Length of L will be from 3 to 100. 

Example Input/Output 1: 

Input: 60@2 120@3 

Output:

36.00 kmph 

Explanation:

Total distance = 60+120 = 180 km. 

Total time taken = 2+3 = 5 hours. 

Hence average speed = 180/5 = 36.00 kmph

Source Code:

import java.util.*;

public class Hello {

    public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

String s=sc.nextLine();

String[] s1=s.split("\\s");

double t=0,t1=0;

for(int i=0;i<s1.length;i++)

{

String[] s2=s1[i].split("@");

t+=Integer.parseInt(s2[0]);

t1+=Integer.parseInt(s2[1]);

}

double avg=t/t1;

System.out.printf("%.2f kmph",avg);

            }

}