a) 72 seconds b) 132 seconds c) 192 seconds d) 252 seconds Answer: d Explanation: Relative speed = (45 ...
View QuestionThe time taken by a train 180 m long, travelling at 42 kmph, in passing a person walking in the same direction at 6 kmph, will be
a) 18 sec b) 21 sec c) 24 sec d) 25 sec Answer: a Explanation: Speed of ...
View QuestionA train speeds past a pole in 20 seconds and speeds past a platform 100 meters in length in 30 seconds. What is the length of the train?
a) 100 meters b) 150 meters c) 180 meters d) 200 meters Answer: d Explanation: Let the length of ...
View QuestionTwo trains of equal lengths takes 10 seconds and 15 seconds respectively to cross a telegraph post. If the length of each train be 120 miters, in what time ( in seconds) will they cross each other traveling in opposite direction?
a) 10 b) 12 c) 15 d) 20 Answer: b Explanation: $$\eqalign{ & {\text{Speed of the train}} \cr & ...
View QuestionTwo trains of equal length are running on parallel lines in the same directions at 46 km/hr and 36 km/hr. The faster train passes the slower train in 36 seconds. The length of each train is?
a) 50 m b) 72 m c) 80 m d) 82 m Answer: a Explanation:$$\eqalign{ & {\text{Let the length of ...
View QuestionA train, 240 m long, crosses a man walking alone the line in opposite direction at the rate of 3 kmph in 10 seconds. The speed of the train is?
a) 63 kmph b) 75 kmph c) 83.4 kmph d) 86.4 kmph Answer: c Explanation:$$\eqalign{ & {\text{Speed of the train ...
View QuestionTwo trains are coming from opposite directions with speed of 75 km/hr and 100 km/hr on to parallel tracks. At some moment the distance between them is 100km. After T hours, distance between them is again 100 km. T is equal to?
a) 1 hr b) $$1\frac{1}{7}$$ hr c) $$1\frac{1}{2}$$ hr d) 2 hr Answer: b Explanation: $$\eqalign{ & ...
View QuestionTwo trains of lenths 120 m and 90 m are running with speed of 80 km/hr and 55 km/hr respectively towards each other on parallel lines. If they are 90 m apart, after how many seconds they will cross each other?
a) 5.6 sec b) 7.2 sec c) 8 sec d) 9 sec. Answer: c Explanation: $$\eqalign{ & {\text{Relative ...
View QuestionA train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?
a) 69.5 km/hr b) 70 km/hr c) 79 km/hr d) 79.2 km/hr Answer: d Explanation: $$\eqalign{ & {\text{Let}}\,{\text{the}}\,{\text{length}}\,{\text{of}}\,{\text{the}}\,{\text{train}}\,{\text{be}}\,x\,{\text{metres}} \cr & \,{\text{and}}\,{\text{its}}\,{\text{speed}}\,{\text{by}}\,y\,{\text{m/sec}} ...
View QuestionA train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is:
a) 50 m b) 150 m c) 200 m d) Data inadequate Answer: b Explanation: $$\eqalign{ & {\text{Let}}\,{\text{the}}\,{\text{length}}\,{\text{of}}\,{\text{the}}\,{\text{train}}\,{\text{be}}\,x\,{\text{metres}} \cr & ...
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