Question

the present age of A and B are in the
ratio 7:5 10 years greater there age
will be ratio 9:7 find there present
age​

Answer 1

Answer:

60

Step-by-step explanation:

ATQ

7X+10. 9

------------ = ------

5X+10. 7

by cross multiply

49X+70=45X+90

taking X on one side

49X-45X=90-70

4X=20

X=5

present age

12X

i.e 12*5=60

Answer 2

Answer:

35 years and 25 years.

Step-by-step explanation:

Let the present ages of A and B be 7x years and 5x years respectively.

Ten years later, age of A will be (7x + 10) years and age of B will be (5x + 10) years.

According to question,

7x + 10 / 5x + 10 = 9 / 7

=) (7x + 10) 7 = (5x + 10) 9

=) 49x + 70 = 45x + 90

=) 49x - 45x = 90 - 70

=) 4x = 20

=) x = 20 / 4

=) x = 5.

Therefore, present age of A = (7x) years = (7 × 5) years = 35 years and present age of B = (5x) years = (5 × 5) years = 25 years.

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