Laravel 5.2: url not found but router is available in windows 7 wamp server

Default route is running

for example:

Route::get('/', function () {
return view('welcome');
});

When i run this http://localhost/laracast/public Shows outputs as LARAVEL 5

But when I add new route to

Route::get('/hello', function() {    
return 'Welcome to Laracast';
});

It shows output as => url not found

I am using

1.Windows7

2.Wamp Server

3.Composer and

4.GIT BASH

what the mistake i done it

via Chebli Mohamed