The ratio of Chris an iood Dom's ages is

Computers and Technology

1 answer:

irinina [24]3 years ago

8 0

Answer:

28 years

Explanation:

Let's represent present age of Chris and Dom as C and D respectively. Then since ratio of present age of Chris and Dom is 3:4. Therefore,

$\frac{C}{D}=\frac{3}{4}$

$C=\frac{3}{4}D$ ...(1)

Now, it is given that in 7 years their age ratio will become 4:5. Therefore,

$\frac{C+7}{D+7}=\frac{4}{5}$

$5C+35=4D+28\\$

Using value of C from equation(1),

$5\times\frac{3}{4}D-4D=28-35$

$15D-16D=-28\\-D=-28\\ D=28$

Thus, present age of Dom is 28 years.

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