Unformatted text preview: 1.8 The speed limit on many highways in the United States is 55 miIh. What number would be posted in kilometers per hour? Solution 55 mi 1760 yd--X X h lmi Result obtained by rounding only at the end of the calculation , I v l m 1km ~ l.094 yd X 1000 m = 88 km/h Note that all units cancel except the desired kilometers per hour. SEE EXERCISES 1.47 THROUGH 1.49 EXAMPLE 1.9 A Japanese car is advertised as having a gas mileage of 15 kmJL. Convert this rating to miles per gallon. Solution Result obtained by rounding only at the end of the calculation 15 k:m 1000 m l.094 yd 1 mi 1 ~ 4 qt t .-~-X 1 k:m X 1 m X 1760 yd X 1.06 qt X 1 gal = 35 mi/gal SEE EXERCISE 1.50...
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- Spring '10
- Organic chemistry, Orders of magnitude, Kilometre, Yd, correct units, 1 kilometre