A jet airliner moving initially at 687 mph (with respect to the ground) to the east moves into a region where the wind is

Question

A jet airliner moving initially at 687 mph (with respect to the ground) to the east moves into a region where the wind is blowing at 730 mph in a direction 70° north of east. 
What is the new speed of the aircraft with respect to the ground? Answer in units of mph.

Kunduz · Accepted Answer

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