Skip to main content

Aptitude Day 269


Problems on Time and Distance:

1. A person travels from P to Q at a speed of 50 km/hr and returns by increasing his speed by 20%. What’s his average speed for both the trips?

Solution:
                  120% of 50 = 120/100*[50] = 60 km/hr.

                  Average speed = 2*50*60/[50+60] 
                                          = 6000/110 
                                          = 54.55 km/hr.

2. A car travels the 1st one-third of a certain distance with a speed of 20 km/hr, the 2nd one-third with a speed of 10 km/hr, and the last one-third distance with a speed of 30 km/hr. The average speed of the car of the whole journey.

Solution:
                  Let the whole distance and speed be x and y respectively.
                  (x/3)/20 + (x/3)/10 + (x/3)/30 = x/y

                  By solving the above equation, we get
                  y = 180/11 
                     = 16(4/11) km/hr.



Comments

Post a Comment

Popular posts from this blog

Aptitude Day 5

Answers of Day 4 :   1. 9                                   2. 5                                   3. 9                                   4. 8 To find the unit digit in the product. This is similar to the last model where we will find the unit digit of the sum. Example: 432*459*28*48=? Solution:  2*9=18 , 8*8=64, 4*8= 32. The unit digit of the total product is 2.  Problems to solve Find the unit digit of the product in the following 1. 404*397*810*21 =? 2. 24*42*36*78 =? 3. 81*82*89 =? 4. 72*36*98*47 =? See you tomorrow friends... Check out the answers over here  Aptitude Day 6
Post a Comment
Read more

Vocabulary Day 82

Flutter Thesaurus: Verb: wave rapidly            drift, agitate, dance, flicker, fluctuate, hover, oscillate, quiver, shake, vibrate...                                           Antonyms:  stay, remain, stay . ..  Example sentences:         ·        His heart flutters when he sees his crush.  ·       That incident causes a  flutter between them. 
Post a Comment
Read more

Why Procrastinating for the first time is good for you?

    Why Procrastinating for the first time is good for you?       Hello everyone. What's up? Are you working on your goals effectively? Hope you're doing well. Let's get into the topic  Why Procrastinating for the first time is good for you? . . . Curious... Isn't it?          As I told you in my earlier post , I've learnt a lot in the last year. Today's post is about the things which I've learnt after I procrastinated my works. Not only I've learnt a few things but also I've developed some good attitudes. I've listed a few. ·         You'll come to know your capacity  ·         You'll overcome your laziness ·         You'll push into the habit of prioritizing even if you're really bad at it ·         You'll get to know your best time management skills ...
Post a Comment
Read more