Question

According to modern science. Earth is about 4.5 billion years old and written human history extends back about 10,000 years. Suppose you represent the entire history of Earth by 12 hours on a clock, with the birth of Earth at the stroke of midnight and today at the stroke of noon. How much time on the clock represents 1 billion years?

Answer 1

Answer:

the clock will represent 4.5 billion years as 2.67 hours

Step-by-step explanation:

Data provided in the question:

Total time of history of Earth = 4.5 billion years

Representation of total time of history of Earth on clock = 12 hours

Therefore,

4.5 billion years = 12 hours

or

⇒ 1 billion year = $\frac{\textup{12 hours}}{\textup{4.5}}$

or

⇒ 1 billion year = 2.67 hours

Hence,

the clock will represent 4.5 billion years as 2.67 hours