Math
posted by Grace .
An airplane traveled a distance d in t hours, where r>1, and arrived one hour late. The airplane would have arrived on time if it had traveled at what rate per hour?
a. t1
b. d/t1
c. d/t+1
d. d/t1
e. d/t+1

speed = distance/time.
its speed was d/t
on time its time would have been 1 hour less, so its speed would be d/(t1)
Respond to this Question
Similar Questions

math
a bus takes 12 hours to travel the same distance that an airplane travels in 1.5 hours. the average speed of the airplane ia 120 km per hour faster than five times the average speed of the bus. what is the average speed of the bus? 
math
two airplanes left the same airport traveling in opposite direction. if one airplane averages 400 miles per hour and the other airplane averages 250 miles per hour, in how many hours will the distance between the two planes be 1625 … 
Math
The relationship between the speed of travel and the distance traveled can be described by the equation d=rt where d = distance traveled in miles, r = speed (or rate) of travel in miles per hour, and t = time traveled in hours. Graph … 
mat 116
a busleaves a station at 1 pm, traveling west at an average rate of 44 mi/h. One hour later a second bus leaves the same station, traveling east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart? 
math
explain how to write 20 miles divided by 4 hours as a unit rate If that's distance traveled per unit of time it would be 20miles per 4 hrs but since it's usually compared per hour... 20/4= 5 miles so every hour you travel 5 miles and … 
math
A teacher drove 280 miles to attend a mathematics conference and arrived 1 hour late. The teacher figured out that, had she increased her average speed by 5 mph, she would have arrived on time to the conference. What was her average … 
TRIG
An airplane flying at 550 miles per hour has a bearing of 53°. After flying for 2.5 hours, how far north and how far east will the plane have traveled from its point of departure? 
Math Algebra
A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; … 
Algebra
A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; … 
Algebra Help
A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 miles at a certain rate; traffic then increased and for the next 6 miles he averaged 10 miles per hour less than his original speed; then …