Each Ferris wheel in paradise park has 19 seats. Each seat in a Ferris wheel can hold 15 people. How many people can ride 20 Ferris wheels at the same time?
First, we need to find how many seats are in 20 Ferris wheels. There are 19 seats in 1 Ferris wheel, so there are 19 x 20 = 380 seats in 20 Ferris wheels. 

Next, we need to find how many people can ride in 380 seats. Each seat can hold 15 people, so 380 seats can hold 15 x 380 = 5700 people. 

Therefore the answer (numeric) is: 

5700