Since the train covers different distance with different speeds. So, Average speed = Total Distance/Total Time Total distance = 80 + 50 + 60 = 190 km Time1 = 80/55, Time2 = 50/40 & Time3 = 60/80 Total Time = 80/55 + 50/40 + 60/80 Therefore, Average Speed = 190/(80/55 + 50/40 + 60/80) = 55 km/hr
What is the principle involved in DNA movement in Electrophoresis?
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