If 4 people take 12 days to built a wall, how long would 3 people take, working at the same rate

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish