Answer:
84 because 98/70= 1.4, 1.4x60=84
10 minutes is 1/6 of an hour.
1 hour and 10 minutes = 7/6 hours
98 km / 7/6 = 98 x 6/7 = (98 x 6) /7 = 588/7 = 84 km per hour
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