Question

Ifa:b=5:9
b:c- 4:7find
a:b:c

a 15:33:36
b 21:42:49
c 24:32:48
d 20:36: 63​

Answer 1

Answer:

Given that a:b=5:9 and b:c=4:7.

Here the common term is b which is found in both the ratios.

Ok now let’s look at the value of b in 1st ratio. It is 9. And 4 in the second.

Now we have to take the LCM of these two values so that we are changing the value of b into the LCM value in both the ratios. The LCM is 36.

So we change the value of b into 36 in the 1st and 2nd ratio. 9*4=36. So multiply the whole 1st ratio by 4 making a:b=20:36

Similarly change the value of b as 36 in the second ratio. 4*9=36. Hence multiply the entire second ratio by 9 making b:c=36:63.

Now that the value of b in both the ratio being same we can concatenate them.

Hence a:b:c=20:36:63.

Step-by-step explanation:

hope it helps you....

Answer 2

Answer:

the answer is d as 5*4,9*4;4*9,7*9

hope it was helpful