It depends on where your starting point is.
Caste is a Hindu concept, not a Buddhist one. The fact that a person is considered untouchable according to Hinduism has no effect on how long it will take him/her to attain nibbana(nirvana) according to Buddhism.
There are a few things that can happen when people reach Nirvana. People are generally said to have finally found peace.
And it's spelled 'nirvana' Well they try to reach nirvana because they want to escape the cycle of reincarnation.
It is said he lived for about 80 years. It is also said he was the first person to reach Nirvana.
Buddhism.
Nirvana.
Buddhism
The main goal of Buddhism is to reach enlightenment, or nirvana. You can reach Nirvana by learning and understanding the Four Noble Truths and following the Eightfold path.
The goal of Buddhism is to reach enlightenment (nirvana) so its one of the main reasons for being.
Nirvana in the Hindu religion means having a connection and being at peace with Brahman. Brahman means the reality of the world.
It takes as long as it takes. The course to enlightenment can takes many thousands of lifetimes. However the person who is presently a Zen Buddhist may have been through these reincarnations already and learned from them and may be ready to become enlightened. This does not however mean he is going to Nirvana as the enlightened may opt to return to the cycle o death and rebirth to enlighten others.
because he said they would eventually reach a state of perfect peace as long as they have good karma