Question

the present age of a,b,c,in the proportion 10:11:12 five years ago,the some of their ages was150.their present age are:

Answer 1

Let the present age be,
10x, 11x, 12x

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5 years ago,

10x -5 +11x-5+12x-5 =150

10x+11x+12x -15=150

33x = 150+15

33x = 165

x = 5

Present age of,
a =10x =10×5=50 years

b = 11x =11×5 =55 years

c =12x =12×5=60years

I hope this will help you



-by ABHAY