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Two siblings Mark and Steve start from the same point and walk in the same direction at speeds of 5 kilometres per hour and 10 kilometres per hour respectively. After walking for an hour, Mark turns around and walks back along the same path to the starting point. Mark rests for half an hour at the starting point, and then hires a taxi driving at 30 kilometres per hour to catch up with Steve. If the taxi charges $10 for the first 2 kilometres and $2 for every subsequent 500 metres, how much in dollars does Mark pay for the taxi ride?
A. 92
B. 102
C. 142
D. 152
E. 160
The OA is D
Source: E-GMAT
A. 92
B. 102
C. 142
D. 152
E. 160
The OA is D
Source: E-GMAT
