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