In military usage, "klicks" is used, though written as km/h. In informal Australian usage, km/h is more commonly pronounced "kays" or "kays an hour". For example, news organisations such as Reuters and The Economist With no central authority to dictate the rules for abbreviations, various publishing houses have their own rules that dictate whether to use upper-case letters, lower-case letters, periods and so on, reflecting both changes in fashion and the image of the publishing house concerned. "Kilometres per hour" did not begin to be abbreviated in print until many years later, with several different abbreviations existing near-contemporaneously. The kilometre, a unit of length, first appeared in English in 1810, and the compound unit of speed "kilometers per hour" was in use in the US by 1866. Abbreviations Ībbreviations for "kilometres per hour" did not appear in the English language until the late nineteenth century. While these forms remain widely used in non-scientific fields, they are not correct for scientific use with the SI. Several other representations of "kilometres per hour" have been used since the term was introduced and many are still in use today for example, dictionaries list "kph", "km/h", "kmph" and "km/hr" as English abbreviations. The SI representations, classified as symbols, are "km/h", " km h −1" and " km The Dutch on the other hand adopted the kilometre in 1817 but gave it the local name of the mijl ( Dutch mile). In 1802 the term " myriamètres par heure" appeared in French literature. 2.3 Alternative abbreviations in official useĪlthough the metre was formally defined in 1799, the term "kilometres per hour" did not come into immediate use – the myriametre ( 10,000 metres) and myriametre per hour were preferred to kilometres and kilometres per hour.The road from the cottage to the shop 6 km away leads either along a straight road that the bicycle can drive at a speed of 18 km/h or by "shortcut". It took 4 hours for the two to meet if Jake's speed was 15 mph slower than Brian's.
What is his average speed for the entire trip?īrian and Jake left their homes 500 miles apart and drove straight toward each other. he then traveled back home on the same path at a speed of 24 miles per hour. Starting at home, Tony traveled uphill to the store for 45 minutes at 8 miles per hour. Use the following facts to convert this units: 1 meter = 39.37 inches, 1 mile = 1609 m, 1 hour = 60 minutes Express it in miles per hour, correct to three significant figures. The speed of the mail train is 1370 meters per minute. When did the faster caravan run slower? How far from the oasis? Two hours later, a second caravan followed her at 2.5 miles per hour. After how many hours will the cars be 30 miles apart?Īt 6:00 in the morning, a caravan set out of the oasis at a speed of 1.5 miles per hour. If John starts running at 10:00 AM, and Lucy starts running at 10:30 AM, what time will they meet? (as soon as possible)Īt 9:00 AM, two cars started from the same town and traveled at a rate of 35 miles per hour, and the other car traveled at a speed of 40 miles per hour.
If John has a running speed of 3.5miles per hour and Lucy has a speed of 5 miles per hour. Find how long it takes her to drive round-trip if she averages 40 mph.
She must go to the law library in city B to get a document. How many hours did it take Ed to drive to New Jersey?Ī woman works at a law firm in city A, about 50 miles from city B. How far can she walk in 2 hours 45 minutes?Įd drove to New Jersey at 30mph. Lucie can walk about 3 4/5 miles each hour. After an eight-hour flight is at its destination, how far did the plane fly? What is the unit rate that this train is traveling per hour? Write in miles per hour.Ī plane is flying at the rate of 350 mph. Conversion of a velocity unit in word math problems and questionsĪ train can travel 1136 miles in 4 hours.