Respuesta :
Answer:
The speed of car production increase at 250%
Step-by-step explanation:
we know that
20 cars in a day represent the 100%
so
Using proportion
Find out how much percentage represent the production increase
The production increase is 70-20=50 cars per day
[tex]\frac{20}{100\%} =\frac{50}{x}\\\\x=100(50)/20\\\\x=250\%[/tex]
therefore
The speed of car production increase at 250%