at a toy factory, toy cars are produced on an assembly line. it takes 8.216 seconds to attach the wheels. it takes 3.652 seconds to attach the hood.how long does it take to attach the wheels and hoods on 42 toy cars?

From what I think;

8.216secs - 1 wheel; 3.652- 1 hood
for I toy car with a wheel and hood the total time is 8.216+ 3.652 = 11.868secs
let x secs be the total time taken to put a wheel and hood for 42 cars
x secs = 42 cars × the total time for one car
x secs = 42× 11.868
x secs= 498.456 secs

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