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?

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 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 ?

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

Last week, police ticketed 13 men traveling 18 miles per hour over the speed limit and 8 women traveling 14 miles per hour over the speen limit. What was the mean speed over the limit of all 21 drivers?

Mike and Fritz ran a 30 - mile Marathon. Mike ran 10 miles per hour and then ran at 5 mile per hour for the remaining 20 miles. Fritiz ran for the first one-third of the time of the run at 10 miles per hour, and for the remaining two-thirds of his time at 5 miles per hour. How much time in hours Mike take to complete the Marathon?

Mike and Fritz ran a 30 - mile Marathon. Mike ran 10 miles per hour and then ran at 5 mile per hour for the remaining 20 miles. Fritiz ran for the first one-third of the time of the run at 10 miles per hour, and for the remaining two-thirds of his time at 5 miles per hour. How much time in hours did Fritz take to complete the Marathon?

A man drove a car at an average rate of speed of 45 miles per hour for the first 3 hours of a 7-hour car trip. If the average rate speed for the entire trip was 53 miles per hour, what was the average rate of speed in miles per hour for the remaining part of the trip?

A car travels from Twon A to Twon B at an average speed of 40 miles per hour, and returns immediately along the same route at an average speed of 50 miles per hour. What is the average speed in miles per hour for the round - trip?

A tennis ball travels at a speed of 96 miles per hour. The speed of the ball in metres per second is :

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