Rachel drove the 120 miles from A to B at a constant speed. What was this speed?

Rachel drove the 120 miles from A to B at a constant speed. What was this speed?

(1) If she had driven 50% faster, her new time would have by 2/3 of her original time.
(2) If she drove 20 mph faster, she would have arrived an hour sooner.

OA B

Source: Magoosh

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