Question

a:b=4:7 and b:c=5:9 then find a:b:c or a:c.​

Answer 1

Answer:

a:b:c = 20:35:63

Step-by-step explanation:

Answer 2

Answer:

20:36:63

Step-by-step explanation:

First we find the lcm of the two b's that is 7 and 5.

Lcm of 7 and 5 = 35 = b

Now we multiply 'a' which is 4 with 'b'(in the second ratio) which is 5.

5 X 4 = 20 = a

Then we multiply 'b' ( In the first ratio) which is 9 and 'c' which is 7.

9 X 7 = 63 = c

Now if we arrange it in order we get

a = 20 : b = 35 : c = 63

= 20 : 35 : 63

Thus the answer is 20 : 35 : 63.