Question

Find A:B:C when A:B=2:5 and B:C=7:9

Answer 1

a:b=2/5=14/35

b:c=7/9=35/45

a:b:c=14:35:45

Answer 2

Answer:

Consider given that,

A:B=7:8 and B:C=2:5

B

A

=

8

7

and

C

B

=

5

2

To equating L.C.M. and we get,

B

A

=

8

7

×

5

5

=

40

35

and

C

B

=

5

2

×

8

8

=

40

16

Then, A:B=35:40.......(1) and B:C=16:40.......(2)

By equation (1) and (2) to,

Hence,A:B:C=35:40:16

Hence, this is the answer.