Assume that the lifetime of the sun is 10 billion years. What will be the lifetime of a star of 4 solar masse

Question

Assume that the lifetime of the sun is 10 billion years. What will be the lifetime of a star of 4 solar masses?

Answer 1

It will burn for less time than our Sun. The extra gravitational pressure will allow the volume in which nuclear reactions are most active to be much larger than the equivalent part of our sun. This will result in consuming hydrogen at a much faster rate. The analogy of a pressure cooker comes to mind.