Question

the sum of ages of 3 persons is 150 years 10yrs ago their ages were in the ratio 7:8:9 their present ages are​

Answer 1

Answer:

45,50 and 55

Step-by-step explanation:

ten years ago, their ages were in the ratio 7:8:9, so you can assume their ages 10 years ago to be 7x, 8x and 9x respectively. 

as of now, their ages would be 7x + 10, 8x + 10 and 9x + 10 

the sum of these ages is 150, so: 

7x + 10 + 8x + 10 + 9x + 10 = 150 

or, 24x + 30 = 150 

or, 24x = 150 - 30 = 120 

or, x = 120/24 = 5 

so their present ages are 7*5 + 10, 8*5 + 10 and 9*5 + 10 

i.e. 45, 50 and 55