শুক্রবার, ২১ আগস্ট, ২০১৫

Rates, Speed, Time and Distance

1. A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 18 seconds. What is the length of the platform in meters? 
   >240 meters
2. A train traveling at 100 kmph overtakes a motorbike traveling at 64 kmph in 40 seconds. What is the length of the train in meters?

   >400 meters
3. Jim travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed. What is the average speed of Jim's travel in mph? 
   >37.5 mph
4. A runs 25% faster than B and is able to give him a start of 7 meters to end a race in dead heat. What is the length of the race? 
    >35 meters
5. Jane covered a distance of 340 miles between city A and city taking a total of 5 hours. If part of the distance was covered at 60 miles per hour speed and the balance at 80 miles per hour speed, how many hours did she travel at 60 miles per hour? 
   >3 hours
6. Steve traveled the first 2 hours of his journey at 40 mph and the remaining 3 hours of his journey at 80 mph. What is his average speed for the entire journey? 
   >64 mph