मेहनत ही सफलता की कुंजी है Mehnat Hi Safalta Ki Kunji Hai So My All Friends aaj Hum Jaane Gay Mehnet Kya Hoti Hai ? Mehnet Karne Ke Bina Insaan Life Me Success Nahi Hota Hai ! Mehnet Kya Hai Hindi Me Jane ! 2017 Key To Success is Hard Work And Determination :- Mehnet