Emily is picking strawberries at a speed of 3 strawberries per second. Her little sister Sophia joins Emily when there are 20 st
rawberries in Emily's basket and starts to eat these strawberries at a speed of 5 strawberries per second. When Sophia finally leaves, there are 8 strawberries in the basket. How long did Sophia stay with Emily?
Using the information from the problem, if Emily continues to pick 3 strawberries per second while Sophia eats 5 strawberries per second, then the amount of strawberries will decrease at a rate of 2 strawberries per second. Therefore, we can find the answer by subtracting 2 from 20 until we get to 8. Since we subtract 2 six times, the answer is 6. Hope this makes sense!
