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[" 9."4" .A car moves a distance of "200...

[" 9."4" .A car moves a distance of "200m" .It covers "],[" first half of the distance at speed "60kmh^(-1)" and "],[" the second haf at speed "v" .If the average "],[" speed is "40kmh^(-1)" ,the value of "v" is "],[[" a) "30kmh^(-1)," b) "13kmh^(-1)],[" c) "60kmh^(-1)," d) "40kmh^(-1)]]

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