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1 mm = () cm 1 cm = () decimeter 1 decimeter = () meter 1 meter = () kilometer 1 kilometer = () hectare
1 mm = (0.1) cm
1 cm = (0.1) decimeter
1 decimeter = (0.1) meter
1m = (0.001) km
1 sq km = (100) ha
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Examples of millimeter, centimeter, decimeter, meter and kilometer
1km = 1000M
1 meter = 10 decimeters
1 decimeter = 10 cm
1 cm = 10 mm
The distance between Nanjing and Shanghai is 312 kilometers. An express train runs from Nanjing to Shanghai, and a local train runs from Shanghai to Nanjing. The local train starts 1.4 hours earlier than the express train. The express train runs for 2.2 hours and meets the local train. The express train runs 10 kilometers more per hour than the local train. How many kilometers do the two trains travel when they meet?
2.2x10 = 22km 312-22 = 290km slow train speed: 290 ^ (2.2 + 2.2 + 1.4) = 50km slow train speed: 50x (1.4 + 22) = 180km fast train speed: 50 + 10 = 60km fast train speed: 60x2.2 = 132km
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