A car travels at a velocity of 80 kmh during the first half of its running and at 40kmh during the other half . Then the average velocity of the car is
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нєℓℓσ мαтє!
Let the total distance be d
Then two halfs of total journey are d/2 each.
S͟p͟e͟e͟d͟ = D͟i͟s͟t͟a͟n͟c͟e͟ / T͟i͟m͟e͟
80 =( d/2 ) / t1
t1 = d / 160
40 = ( d/2 ) / t2
t2 = d / 80
Average Speed = Total Distance / Total Time
= ( d ) / ( d/160 + d/80 )
= d / ( d + 2d ) / 160
=( d / 3d ) × 160 = 53.3 km/h
нσρє ιт нєℓρѕ
Let the total distance be d
Then two halfs of total journey are d/2 each.
S͟p͟e͟e͟d͟ = D͟i͟s͟t͟a͟n͟c͟e͟ / T͟i͟m͟e͟
80 =( d/2 ) / t1
t1 = d / 160
40 = ( d/2 ) / t2
t2 = d / 80
Average Speed = Total Distance / Total Time
= ( d ) / ( d/160 + d/80 )
= d / ( d + 2d ) / 160
=( d / 3d ) × 160 = 53.3 km/h
нσρє ιт нєℓρѕ
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