3. Which is greater -- a speed of 30 m/sec or 30 km/h? [Hint. 30 m/sec = ( 30*18/5) km/h = 108 km/h.
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the correct answer is 30m/s because if you convert it to km/h by multiplying with 18/5 you will get 108 km/h which is greater than 30km/h.
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