Question

A and B age ratio is 3: 7. and there age difference is 20 years. what age of A​

Answer 1

≡QUESTION≡

A and B's ages are in the ratio is 3: 7. There age difference is 20 years. What is A's age?

                                                       

║⊕ANSWER⊕║

GIVEN

A and B's ages are in the ratio 3:7

Difference of the ages = 20 years

Let the ages be 3x and 7x

A.C.Q

7x - 3x = 20

4x = 20

x = 5

Age of A = 3x

               = 3 * 5

               = 15 years

                                                       

Answer 2

Answer:

let ages be

a=3x

b=7x

a/b=3/7  ll 7a=3b   -----eq 1

b-a=20 (b is grerater)  --------------------eq 2

putting value from eq 1

b-a= 20     X 3

=3b-3a=60

we know 3b is 7a

so,

7a-3a=60

4a=60

a=15

so x=15/3=5

b=7*5=35

a=15

b=35

please mark as brainlist