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2014-07-24T17:08:28+05:30

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Total distance travelled (A-B) = 300 m
Total time taken (A-B) = 2mins 30 secs = (2*60 +30) secs = 150 secs
(a) Avg. Speed = 300/150 = 2 m/sec

Total distance = (300+100) m = 400m
Total time = (150 + 60) secs = 210 secs
(b) Avg. Speed = 400/210 = 1.90 m/sec
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