7. Which speed is greater: 30 m/s or 72 km/h?
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Ans 30m/s is greater than 72 km/h
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Answer:
To compare the above two speeds, their units must be the same. Let us make the units same.
1 m/s = 0.001 km/(1/3600) hour. This implies that, 1 m/s = 3.6 km/h.
Therefore, 30 m/s = 30 x 3.6 km/h =108km/h.
But, 30 km/h = 30 km/h.
Therefore, 108 km/h > 30 km/h. So, 30 m/s is greater than 30 km/h.
Explanation:
solve like this not the same ans
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