The age of universe is 1010 years and the age of mankind is 106 years For how many seconds would the mankind have existed if the age of universe was 1 day?
If the age of the universe is equivalent to 1 day, which is 86,400 seconds, then the proportion of mankind's age to the age of the universe is 106 years to 1010 years. Therefore, multiplying 86,400 seconds by 106/1010 will give you the number of seconds mankind would have existed, which is approximately 9,072 seconds.