Step-by-step explanation:
The time taken to reach the location = 90 minutes = 1.5 hours
The speed driven = 70 miles per hour
By formula, speed = distance traveled / time taken
70 miles per hour = distance traveled / 1.5 hours
distance traveled in miles = 70 * 1.5 = 105 miles
Speed = 50 miles per hour
Distance = 105 miles
Time taken = ?
speed = distance traveled / time taken
50 = 105 / time taken
time taken in hours = 2.1 hours = 126 minutes