During a trip of \(200\) kilometres, Stella covers the first \(80\) kilometres at an average speed of \(x\) kilometres

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During a trip of \(200\) kilometres, Stella covers the first \(80\) kilometres at an average speed of \(x\) kilometres per hour and the remaining distance at an average speed of \((x + 15)\) kilometres per hour. If her average speed for the entire trip is \(250/3\) kilometres per hour, what is the value of \(x?\)

A. \(223/3\)
B. \(75\)
C. \(455/6\)
D. \(80\)
E. A unique value cannot be determined

OA B
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