Use the following information to determine the indicated airspeed required to reach point B on schedule.

/in , /by

On a cross-country flight, point A is crossed at 1500 hours and the plan is to reach point B at 1530 hours.  Distance between A and B  70 NM
Forecast wind   310° at 15 kts
Pressure altitude   8,000 ft
Ambient temperature  -10 °C
True course   270°