Answer:
5.5 m/sec
Explanation:
We need to look up (or remember) that 0.44704 m/sec = 1 mph.
Then:
47 mph 0.44704 m/sec
------------- * ----------------------- = 5.5 m/sec
1 1 mph
47 miles per hour = 21 metres per second (to 0 decimal places)
47 miles per hour
47 miles x 1609.344 = 75639.2 metres
75639.2 metres per hour DIVIDED BY 3600 = 21.0108888889 metres per second
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