Answer: The distance left after 25 days is 1280 miles
Explanation:
To calculate the distance, we use the formula:

where,
s = speed of the bicycle = 80 miles/day
t = time taken = 25 days
d = distance travelled = ? miles
Putting values in above equation, we get:

Total distance to the destination = 3280 miles
Distance traveled in 25 days = 2000 miles
Distance left after 25 days = [3280 - 2000] = 1280 miles
Hence, the distance left after 25 days is 1280 miles