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Luke drives the first 300 miles of a trip at 60 miles an hour. How fast does he have to drive, in miles per hour, on the final 200 miles of the trip if the total time of the trip is to equal 7 hours? .
A
100
B
110
C
115
D
120
Correct Answer:
100
On a trip of 200 miles, a man travels at the rate of 40 miles per hour for the first 100 miles. For the rest of the trip, he travels at the rate of 55 miles per hour . What is his average speed, in miles per hour, for the total trip ?
A
400/9
B
200/9
C
90
D
50
when a truck travels at 60 miles per hour, it uses 30 percent more gasoline to travel andy distance than it does when it travels at 50 miles per hour. The truck can travel 20 miles on a gallon of gas if it is travelling at 50 miles per hour. The truck has only 10 gallons of gas and is 160 miles from its destination. It takes 20 minutes for the truck to stop for gas . How long will it take the truck to reach its final destination if it is driven at 60 miles per hour?
A
160 minutes
B
180 minutes
C
190 minutes
D
192 minutes
A car goes 15 miles on a gallon of octane when it is driven at 50 miles per hour. When the car is driven at 60 miles per hour, it only goes 80% as far. How many gallons of octane is needed to travel 200 miles if half the distance is traveled at 50 miles per hour and the rest at 60 miles per hour?
A
13.33
B
16.67
C
10.6
D
15
A truck driver must complete a 180 mile trip in 4 hours. If he drives average 50 miles an hour hour for the first three hours of his trip, how fast must he travel in the final hour?
A
30 mph
B
35 mph
C
40 mph
D
45 mph
How long must a driver take to drive the final 70 miles of a trip if he wants to average 50 miles an hour for the entire trip and during the first part of the trip he drove 50 miles in $$1\frac{1}{2}$$ hours ?
A
54 min
B
1 hr
C
66 min
D
70 min
Jamal covered a distance of 340 miles between ciry A and B taking a total of 5 hours. If part of the distance was covered at 60 miles per hours speed and the balance at 80 miles per hour speed, how many hours didhe travel at 60 miles per hour?
A
2
B
2.5
C
3
D
None
Avi drove from his home to college at 60 miles per hour. Returning over the same route, there was a lot of traffic, and he was only able to drive at 40 miles per hour. If the return trip took 1 hour longer. How many miles did Tie drive each way?
A
3
B
5
C
120
D
240
A motorist must complete 180-mile trip is 4 hours. If he averages 50 miles an hour for the first three hours of the trip , how fast must ( in terms of mile per hour ) he travel in the last hour ?
A
30
B
32
C
40
D
None of these
A man travels 100 miles at 20 miles per hour, 60 miles at 30 miles per hour and 80 miles at 10 miles per hour, what is his average rate for the three trips?
A
18 miles per hr
B
17 miles per hr
C
20 miles per hr
D
16 miles per hr
A truck driver must complete a 180-mile trip in 4 hours. If he average 50 miles an hour for the first three hours of his trip, how fast must he travel in the final hour?
A
30 mph
B
45 mph
C
35 mph
D
40 mph