Question

right from chlldhood a human being starts enjoying the pleasure of reading as child ,he learns the ways of life through reading and writing He is thrilled by going through new little and learning through them .Any new lesson that comes his way excites his emotions by giving his mind freshness of knowledge .A little poem about an animal, a little prose about the toys and a ilttle sentence about society he lives in, give him strange pleasure .​

Answer 1

In such questions,always try to put all quantities in a form of any quantity out of them.

Let's try to put b and c in form of a here,for example.

Given —a:b=5:9 =>a/b=5/9 =>b=9a/5 ….(1)

Again;b:c=4:7 =>c=7b/4 =7(9a/5)/4

=63a/20 {Using (1)}……(2)

Using (1) and (2),we have

a:b:c =a : 9a/5 : 63a/20

= 20a/20 : 36a/20 : 63a/20

=20 : 36 : 63 Ans.{ Taking LCM of denominators of fractions which equals to 20 and cancelling out common part that is,a/20