Verified Answer :

To find this out first we will see how many cars they assemble in 1 hour. Lets do it:-



150 / 3 = 50

50 cars per hr
 
50 * 8 = 400

400 cars in 8 hrs

 
CHECK OUR WORK;-

 
400 / 8 = 50

We were RIGHT!!

 
So, in 8 hrs the factory can assemble 400 cars.

 
Hope I helped ya!! xD

Lets find the unit rate. 

150/3 = x/1

150/3 = 50

Now that we know that a factory can assemble 50 cars per hour, we can multiply that by 8.

150*8 = 1200

Answer: 1200 cars in 8 hours

A fun fact, the assembly line helped factories make cars much faster! :)