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navik [9.2K]
3 years ago
12

a person Can travel 120 miles in one direction. the return trip was accomplished at double the speed and took three hours less t

ime. Find the speed going.
Mathematics
1 answer:
BaLLatris [955]3 years ago
6 0
40 mph would be 120 miles in 3 hours (120/40)

80 mph is 120 miles in 1.5 hours(120/80)

3 - 1.5 = 1.5, not 3 hrs

Change the speed to 20 mph( 1/2 the speed) to double the hours.

20 mph = 6 hours(120/20)

40 mph = 3 hrs(120/40)

6 - 3 = 3 hours difference
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