Just divide by 30 to get m/s. Her average was 8 1/3 meters per second.
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12 metres/minute
250 seconds = 4 minutes and 10 seconds.4 minutes x 60 = 240 seconds+10 seconds = 250 seconds
4 minutes = 240 seconds 250 seconds is longer than that.
250 seconds is larger because 4 minuets = 240 seconds.
-- 8 and 1/3 meters per second -- 250 meters per half-minute -- 500 meters per minute -- 30 kilometers per hour -- 720 kilometers per day -- 10,080 kilometers per fortnight