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7. Express the following speeds in metres per second:(a) 118 km/hours(b) 51.5 km/hours

Answer»

1 km = 1000 m 1 hr = 3600 seconds1) 118 km/h = 118×1000/3600 = 295/9 m/s 2) 5.15 km/h = 5.15×1000/3600 = 51.5/36 m/s

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