** 9) A man is driving on a 360 mile trip. If his average speed is 42 per hour for the first 231 miles, what must be his average speed for the rest of the trip in order to finish the entire trip in 8 hours?**

(A) 49 mph

(B) 51.6 mph

(C) 50.5 mph

(D) 45 mph

** 10) A man travelled a distance of 61 km in 9 hours, partly on foot at the rate of 4 km per hour and partly by bicycle at 9 km per hour. The distance travelled on foot is:**

(A) 25 km

(B) 45 km

(C) 16 km

(D) 20 km

** 11) A motorist travels for 3 hours at 40 miles per hour and then covers a distance of 80 miles in 2 hours and 40 minutes. His average rate for the entire trip was**

(A) 35.3 mph

(B) 36 mph

(C) 37 mph

(D) 35.5 mph

** 12) 10 minutes after a plane leaves the airport, it is reported that the plane is 40 miles away. What is the average speed of the plane, in miles per hour?**

(A) 420

(B) 240

(C) 400

(D) 600

** 13) The distance between 3 cities is 1800 miles. How many hours would it take a train with an average speed of 60 miles per hour to make the trip?**

(A) 40

(B) 35

(C) 48

(D) 30

** 14) In covering a distance of 30 km, A takes 2 hours more than S. If A doubles his speed, then he would take 1 hour less than S. A's speed is:**

(A) 5 kmph

(B) 6.25 kmph

(C) 7 kmph

(D) 8.5 kmph

** 15) A car traveled 75% of the way from town A to town B at an average speed of 50 mph. The car travels at an average speed of S mph for the remaining part of the trip. The average speed for the entire trip was 40mph. The value of S is**

(A) 10

(B) 20

(C) 25

(D) 30