Skip to main content

Aptitude Day 103

Ratio and Proportion :
1. In a school, 30% of the boys are same in the number as 1/2 of the girls. What’s the ratio of boys and girls in that school?

Solution:
                  (30/100)B = (1/2)G
                  B/G = 100/60 = 5/3

                  The required ratio is 5:3

2. Three containers have their volumes in the ratio 1:2:5. They are full of mixtures of milk and water. The mixtures contain milk and water in the ratio of (1:3), (2:1) and (3:1) respectively. The contents of all these three containers are poured into a fourth container. The ratio of milk and water in the fourth container is:

Solution:
                 Let their volumes be x, 2x and 5x respectively.
                
                Milk in the 3 containers = x(1/4) + 2x(2/3) +5x(3/4)
                                                           = x/4 + 4x/3 + 15x/4
                                                           = 64x /12.

               Water in the 3 containers = x(3/4) +2x(1/3) + 5x(1/4)
                                                             = 3x/4 + 2x/3 + 5x/4
                                                             = 32x/12.

                The required ratio =  64x/12 : 32x/12
                                              =  2:1


Comments

Post a Comment

Popular posts from this blog

Vocabulary Day 60

Incur Thesaurus: Verb :  arouse            acquire, earn, gain, include, get, obtain...  Antonyms :  lose, exclude ...  Example sentences:         ·        He is incurred in that game. ·        She incurs a great knowlegde in science.        
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

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