The ratio between the ages of Amar and Kabir is 3:4 at present. after 4 years ago their ages would be 7:9.ratio of ages of Kabir and amar after 20 years from now?

Step-by-step explanation:

Represent Amar age with x

Represent Kabir age with y

So, we have:

Presently

After 4 years

Simplify both ratios:

Cross Multiply

Make x the subject

Cross Multiply

Open Brackets

Collect Like Terms

Substitute for x in

Substitute 32 for y in

So, in 20 years time, the ratio of the ages would be:

This gives

Divide by 4

Hence, the Ratio is

20

step-by-step explanation:

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.