Question
The ratio between the speeds of train J and K is 7:5
respectively. Train J which is (a+140) metre long can cross a pole in 24 seconds. If train K can cross a man in 28 seconds, then find out the difference between the speeds of both trains. It is assumed that both of the trains cross each other in (77/3) seconds.Solution
The ratio between the speeds of train J and K is 7:5 respectively. Let’s assume the speed of train J and K is 7y and 5y respectively. Train J which is (a+140) metre long can cross a pole in 24 seconds. (a+140)/24 = 7y (a+140) = 168y Eq.(i) If train K can cross a man in 28 seconds. Let’s assume the length of train K is ‘k’. k/5y = 28 k = 140y Eq.(ii) It is assumed that both of the trains cross each other in (77/3) seconds. [(a+140)+k]/(7y+5y) = (77/3) [(a+140)+k]/(12y) = (77/3) Put Eq.(i) and Eq.(ii) in the above equation. [168y+140y]/(12y) = (77/3) (308y)/(12y) = (77/3) (77/3) = (77/3) We cannot obtain anything from the given information in the question. So the answer cannot be determined.
Statement
Only a few A is B
All A is C
No C is D
Conclusion
I) No A is D
II) All A being B is a possibil...
Statements: Only cars are motorcycles.
No motorcycle is a bike.
Some bikes are scooters.
All scooters are jeeps.
Conclu...
In the question below there are three statements followed by three conclusions I, II and III. You have to take the four given statements to be true eve...
Statement:
No black is blue
Some black are red
Only a few blues are orange
Conclusion:
I. All red can never be blue
Statements: No sun is a core.
Some cores are earths.
Conclusions: I. Some cores are not suns.
II. So...
- Statements:
All Groups are Teams
Only a few Teams are Colleagues
Only Colleagues are Friends
Conclusion:
I. All Colleagues ... Statement:
All diamonds are heart.
All hearts are Star.
Some hearts are Gold.
Conclusion:
1. All diamonds are gold....
Statements:
All ribbons are mat.
Some mats are ropes.
No rope is a thread.
All thread is a needle.
...
In the following question, find which one word cannot be made from the letters of the given word “PRIVATIZATION”
Statements: All Bikes are Cars.
Some Cars are scooty.
Conclusions: I. Some Bikes are scooty.
II. Some Cars are Bikes.
III...
Relevant for Exams:
