Hello dear, have you ever done Yoga? is a group of physical, mental, and spiritual practices  
That is interesting, I think yoga is pretty cool. I've only done it once in awhile though.
there are two types of yoga: Hatha yoga and Rāja yoga.
What are the differences between those two?
 Rāja yogarefers to the goal of yoga   
so that is they type of yoga that gets you to the goal of yoga?
Yes, and  Hatha yoga emphasizes physical exercises to master the body along with mind 
That makes sense, so one is more about exercise and one is more spiritual.