Question

The circumstances of three wheels are 56cm, 38cm and 72cm. They start moving simultaneously. What is the least distance they should cover so that each wheel makes a complete number of revolutions. (Show Working)
please help fast​

Answer 1

Answer:

The Universe is 13.7 billion years old

If you think that is amazing, perhaps equally remarkable is the fact that we know this to better than 1% precision. Credit goes to the WMAP team for gathering all the information needed to come up with this number. The information is based on measurements made on the CMBR.

Older methods which have contributed to confirming this value include measurements of the abundances of certain radioactive nuclei. Observations made on globular clusters, which contain the oldest stars, have also pointed to values close to this.