human
Martin owns a farm with hens. 10 hens do lay 80 eggs in 10 days. Martin decided to buy 15 more hens. How many eggs will all hens lay in 15 days?
assistant
How many eggs does 1 hen lay in 10 days? ** If 10 hens lay 80 eggs, then 1 hen lays 80 / 10 = <<80/10=8>>8 eggs in 10 days.
How many eggs does 1 hen lay in 5 days? ** That means one hen is laying 8 / 2 = <<8/2=4>>4 eggs in 5 days.
How many eggs does 1 hen lay in 15 days? ** So in 15 days, 1 hen will lay 3 times more eggs, so 4 * 3 = 12 eggs.
How many eggs will all hens lay in 15 days? ** All hens in total will then lay 25 * 12 = <<25*12=300>>300 eggs in 15 days.
#### 300