Skip to main content

Aptitude Day 293

Answers of Day 292: 1. 350 m. 
                                    2. 50 m.

Problems on Trains:

1. A jogger running at 10 km/hr alongside a railway track is 260 m ahead of the engine of a 130 m long train running at 49 km/hr in the same direction. In how much time will the train pass the jogger?
Solution:
                  Relative speed = 49-10 
                                           = 39 km/hr 
                                           = 195/18 m/s.

                   Time = (260+130)/ (195/18) 
                            = 390*18/195 
                            = 36 seconds.

2. A train 180 m long is running with a speed of 50 km/hr. In what time will it pass a man who is running at 5 km/hr in the direction opposite to that in which the train is going?

Solution:
                   Relative speed = 50+5 = 55 km/hr 
                                                        = 55*5/18 
                                                        = 275/18 m/s.

                   Time = 180*18/275
                            = 11.8 seconds.


Comments

Post a Comment

Popular posts from this blog

Aptitude Day 332

Answers of Day 331: 1. 450%.                                     2. 10.   Problems on Percentage: 1. 0.001 is what percent of 0.01? Solution:                   0.001/0.01 * 100 = 1/10* 100                                               = 10%. 2. A fruit seller had some apples. He sells 20% apples and still has 500 apples. Originally, he had: Solution:                (100-20)% of x = 500                80/100*x = 500                x = 625.
Post a Comment
Read more

Vocabulary Day 21

Stammer Thesaurus: Verb : stutter in speech, speak haltingly, speech defect           halt, hesitate, pause, stop, sputter... Antonyms : say quickly, pronounce, enunciate... Example sentences: ·          He was stammering when the teacher caught him red-handed. ·          One should avoid the stammering while delivering a speech. 
Post a Comment
Read more