1)i want to send 15$ to 10 BTC (total 150$) is there way to send them all in same time with same fee like i send 150$ to one address ?
2) if Number 1 possible how can do this using blockchain.info and how to detect fee ?
Technically yes you can do this.
However as far as i know i think blockchain.info has disabled the custom send feature that used to allow you to do this. It is much better for you to get an electrum wallet and do sending with multiple outputs.
You can save lots of money in terms of fees, if you do it.