Skip to main content

Aptitude Day 266

Problems on Time and Distance:

1. A cycle starts with a speed of 7 m/s with its speed increasing every 2 minutes by 1 m/s. In how many minutes will it cover 48 m?

Solution:
                  Distance covered in 1st 4 minutes = 7*2 + 8*2 = 14+16 = 30 m.

                  Remaining  distance = 48-30 = 18 m.

                  Time taken = 18/9 = 2 seconds.

                  Total time taken = (2+2) minutes +2 seconds 
                                             = 4 minutes 2 seconds.

2. A train covers a distance of 20 km in 15 minutes. If its speed is decreased by 10 km/hr, the time taken by it to cover the same distance will be:

Solution:
                  Speed = 20* 1/18*[60] = 80 km/hr.

                  Decreased speed = 80 – 10 = 70 km/hr.

                  The time taken to cover the same distance = 20/70*[60] 
                                                                                      = 17(1/7) minutes.


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