Quantitative Aptitude :: Time and Distance - Discussion

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Explanation:
n/P = 144 gives an approximate relationship between n and P where, n = number of steps per minute and P = pacelength in meters. Bernard knows his pacelength is 164cm.
Number of steps in one minute = 144*1.64
Distance travelled in 1 minute = 144*1.64*1.64 metres Distance travelled in one hr = 144*1.64*1.64*60/1000 km = 23.24 km approx