Question:medium

The spot speeds (in km/h) of eight vehicles in a traffic stream are 42, 52, 56, X, 53, 62, 65, and 48. X is the spot speed of the fourth vehicle. The Time Mean Speed of the traffic stream is 56.25 km/h. After determining the value of X, the calculated Space Mean Speed of the traffic stream is _________ km/h. (rounded off to two decimal places)

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The Time Mean Speed (TMS) is the average of the spot speeds, while the Space Mean Speed (SMS) considers the time spent by vehicles to cover the distance, and thus is usually lower than the TMS.
Updated On: Nov 25, 2025