Question

11. A's age 7yr ago was 10 yr more than helf his preset age. The respective ratio
between B's age 4yr ago and A's age that time was 2 : 5. If C's age 12yr hence will
be thrice of B's age 2yr ago. What is C's present age ?
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Answer 1

Step-by-step explanation:

a-7 = (a/2) +10

2a - 14 = a+20

a = 34

b-4 = 2p ( two parts)

a-4 = 5p ( five parts )

sub a value in a-4 = 5p

34-4 = 5p

30 = 5p

p = 6

sub p value in b-4 = 2p

b-4 = 2p

b = 16

Now c's age 12 yrs hence will be thrice of B's age 2yr ago

c+12 = 3(b-2)

c+12= 3(16-2)

c+12= 3(14)

c= 42-12

c = 30