The reduction is speed, r in miles per hour of an enginge having n bogies attached to it is given as : ` r = 4sqrt(n)`. The final speed, s, in miles per hour , at which the engine can pull the n bogies attached is give as : ` s = 40 - r` . What is the maximum number of bogies that the engine call pull ?

The reduction in speed, r,in miles per hour, of an engine having n bogies attached to it is given as : r = 4sqrt(n) . The final spee d , s, in miles per hour , at which the engine can pull then bogies attached is given as: s = 40 - r . What is the speed of the train , to the nearest tenths, in miles per hour, when there are 15 bogies attached ?

A cheetah ran 12 miles at an average rate of 50 miles per hour and then ran the next 12 miles at an average rate of 43 miles per hour. What was the average speed, in miles per hour, of the cheetah for the 24 miles ?

Speed in kilometer per hour in S.I. unit is represented as

An elephant traveled 7 miles at an average rate of 4 miles per hour and then traveled the next 7 miles at an average rate of 1 mile per hour. What was the average speed, in miles per hour, of the elephant for the 14 miles?

A cyclist travels at 12 miles per hour. How many minutes will it take him to travel 24 miles

Tina runs at a rate of 8 miles per hour. At that rate, how many miles will she run in 12 minutes?

A man covvers a distance olf miles at a speed of s miles per hour and another distance , D at 3 s miles per hour. If D gt 2d , and the man makes the entire journey within 2 hours , and d lt ks , what is the value of K ?

A motot boat traveling at 18 miles per hour traveled the length of a lake in one-quarter of an hour less time than it took when travelling at 12 miles per hour. What was the length in miles of the lake?

The gas mileage for Jan's car is 28 miles per gallon when the car travels at an average speed of 55 miles per hour. The car's gas tank has 20 gallons of gas at the beginning of a trip. If Jan drives at an average speed of 55 miles per hour, Which of the following functions f models the number of gallons of gas remaining in the tank t hours after the trip begins ?

Two people are 14 miles apart and begin walking towards each other. Person A walks 3 miles per hour, and Person B walks 4 miles per hour. How long will it take them to reach each other?