How do I add used Time in scoreboard

Hi,

I am trying to add used time to scoreboard. When person perss pause button, timer stops. I can see used time in my game but I dont know how to add it in scoreboard. I know how to add score and player name but I have problem with used time. In c# script below I add username and score to scoreboard. I tried to add used time same way as I add username to scoreboard. It does not work. How can I reach used time? string does not seem to work.

using UnityEngine; using System.Collections;

public class Game : MonoBehaviour {

 // Use this for initialization
 void Start () {
 
 }
 
 // Update is called once per frame
 void Update () {

     if (Input.GetMouseButtonDown(0)) {


         string username =   SaveInputField.NimiTeksti.text;
          
 int score = ScoreManager.score;

             for (int i = 0; i < Random.Range(5,10); i ++){
                 
             }

         Highscores.AddNewHighscore(username,score);

         }

     }

 }

using UnityEngine; using System.Collections; using UnityEngine.UI;

public class Timer : MonoBehaviour {

 public Text timerText;
 private float startTime;



 void Start () {
     startTime = Time.time;
     }

 void Update (){
     
     float t = Time.time - startTime;

     string minutes = ((int)t / 60).ToString ();
     string seconds = (t % 60).ToString ("f0");

     timerText.text = minutes + ":" + seconds;
 }
 public void Finnish()
 {
     

}

}