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- Question
- A train 120 meters long, crosses a pole in 10 seconds. The speed of the train is?
Options- A. 40 km/hr
- B. 43.2 km/hr
- C. 45 km/hr
- D. None of these
- Correct Answer
- 43.2 km/hr
ExplanationLength of train = 120 m.
Total taken in crossing the pole = 10 seconds.
Speed of the train = length / time
= 120 / 10
= 12 m/s
= 12 x (18/5)
= 43.2 km/hr - 1. A sum of Rs. 12000 deposited at compound interest becomes doubles after 5 years. After 20 years it will become?
Options- A. 120000
- B. 192000
- C. 124000
- D. 96000 Discuss
- 2. An express traveled at an average speed of 100 km/hr, stopping for 4 min after every 75 km. How long did it take to reach its destination 600 km from the starting point ?
Options- A. 6 hrs 24 min
- B. 6 hrs
- C. 7 hrs 21 min
- D. 6 hrs 28 min Discuss
- 3. Robert is traveling on his cycle and has calculated to reach point A at 2 p.m. if he travels at 10 km/hr; he will reach there at 12 noon if he travels at 15 km/hr. At what speed must he travel to reach A at 1 p.m. ?
Options- A. 20 kmph
- B. 18 kmph
- C. 12 kmph
- D. 16 kmph Discuss
- 4. Two trains running in opposite directions cross a pole placed on the platform in 47 seconds and 31 seconds respectively. If they cross each other in 33 seconds, what is the ratio of their speeds?
Options- A. 1:7
- B. 7:1
- C. 2:3
- D. 3:2 Discuss
- 5. A loan was repaid in two annual instalment of ? 1089 each. If the rate of interest be 10% per annum compounded annually, the sum borrowed was?
Options- A. ? 1840
- B. ? 1890
- C. ? 1850
- D. ? 1860 Discuss
- 6. A jeep travels a certain distance taking 6 hrs in forward journey, during the return journey increased speed 12km/hr takes the times 4 hrs. What is the distance travelled by the jeep is ?
Options- A. 244 km
- B. 144 km
- C. 444 km
- D. 344 km Discuss
- 7. 'K' cycled from A to B at 10 kmph and returned at the rate of 9 kmph. 'L' cycled both ways at 12 kmph. In the whole journey 'L' took 10 minutes less than 'K'. Find the distance between A and B ?
Options- A. 32.1 km
- B. 15.23 km
- C. 3.75 km
- D. 32.1 m Discuss
- 8. Laxmi and Prasanna set on a journey. Laxmi moves northwards at a speed of 20kmph and Prasanna moves southward at a speed of 30 kmph. How far will be Prasanna from Laxmi after 60 minutes ?
Options- A. 24 km
- B. 50 km
- C. 42 km
- D. 30 km Discuss
- 9. Two cyclists P and Q cycle at 20 km/hr and 25 km/hr towards each other. What was the distance (in kms) between them when they started if they met after 56 minutes?
Options- A. 36
- B. 39
- C. 42
- D. 45 Discuss
- 10. You drive to the store at 20 kmph and return by the same route at 30 kmph. Discounting the time spent at the store, what was your average speed ?
Options- A. 25 kmph
- B. 24 kmph
- C. 26 kmph
- D. 22 kmph Discuss
More questions
Correct Answer: 192000
Explanation:
? 2P = P(1 +r/100)5
? (1 +r/100)5 = 2
? (1 + r/100)20 = 24 = 16
Thus, P(1 +r/100)20 = 16P
= Rs. (12000 x 16)
= Rs. 192000
Correct Answer: 6 hrs 28 min
Explanation:
Time taken to cover 600 km = 600/100 = 6 hrs.
Number of stoppages = 600/75 - 1 = 7
Total time of stoppages = 4 x 7 = 28 min
Hence, total time taken = 6 hrs 28 min.
Correct Answer: 12 kmph
Explanation:
Let the distance traveled be x km.
Then, x/10 - x/15 = 2
3x - 2x = 60 => x = 60 km.
Time taken to travel 60 km at 10 km/hr = 60/10 = 6 hrs.
So, Robert started 6 hours before 2. p.m. i.e., at 8 a.m.
Required speed = 60/5 = 12 kmph.
Correct Answer: 1:7
Explanation:
Let the speed of the trains be x and y respectively
length of train1 = 47x
length of train2 = 31y
Relative speed= x + y
Time taken to cross each other = 33 s
=>
= 33
=> (47x + 31 y) = 33(x + y)
=> 14x = 2y
=> x/y = 2/14 = 1/7
= 1:7
Correct Answer: ? 1890
Explanation:
Principle = ? 1089
? P/{(1 + 10/100) + (1 + 10/100)2 } = 1089
? P = {(1089 x 10/11) + (1089 x 100/121)} = (990 + 900) = ? 1890
Correct Answer: 144 km
Explanation:
Given a jeep travels a certain distance taking 6 hrs in forward journey
During the return journey, it takes 4 hrs with an increased speed 12 km/hr
Let 'x' be the distance.
Now, speed is given by distance/time.
Here the difference between both speeds = 12
=> x = 144 km
Therefore, the distance travelled by the jeep in forward or return journey is x = 144 km.
Correct Answer: 3.75 km
Explanation:
Let 'd' be the distance between A and B
K -time = d/10 + d/9 = 19d/90 hours
L -time = 2d/12 = d/6 hours
We know that, 10 min = 1/6 hours
Thus, time difference between K and L is given as 10 minutes.
=> 19d/90 - d/6 = 1/6
=> (19d-15d)/90 = 1/6
=> 4d/90 = 1/6
Thus,
d= 15/4 km = 3.75 km.
hence the distance between A and B is 3.75 km.
Correct Answer: 50 km
Explanation:
We know 60 min = 1 hr
Total northward Laxmi's distance = 20kmph x 1hr = 20 km
Total southward Prasanna's distance = 30kmph x 1hr = 30 km
Total distance between Prasanna and Laxmi is = 20 + 30 = 50 km.
Correct Answer: 42
Correct Answer: 24 kmph
Explanation:
Average speed=total distance/total time
Let distance to store be K
then, total time =(K/20)+(K/30)=K/12
and, total time =(2K)
so average speed= 2K / (K/12) = 24kmph.
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