can any one explain ?different uses of the word "How " in german
1. How are you ?
2.How much are these mangoes ?
3.How far is the shop from here ?
4. How long does it take to get to the airport?
5. How long do the shops remain open in this area ?

Question

can any one explain ?different uses of the word "How " in german 
1. How are you ?
2.How much are these mangoes ?
3.How far is the shop from here ?
4. How long does it take to get to  the airport?
5. How  long do the shops remain open in this area ?

Answer

Hello Sunita ,
1- Wie geht es dir ?
2-Wie viel kosten diese Mangos ?
3- Wie fern ist der Laden ?
4- Wie lange braucht man bis zum Flughafen?
5- Wie lange bleiben die Geschaefte offen in dieser Gegend?
As you see you will be adding viel , fern, lange etc to " Wie" to give different meanings .
You could use many other adjectives such as , Wie gross , Wie nah , etc ( How big , How near etc).