Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

A woman shoots her husband.

Then she holds him under water for over 5 minutes.

Finally, she hangs him.

But 5 minutes later they both go out together and enjoy a wonderful dinner together.

How can this be?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

What kind of band never plays music?

What has many keys but can’t open a single lock?

My location can be determined by the below rebus.
So where am i ?

You can hear me, but you can't touch or see me.

What am I?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13