Question
The ratio of age of βBβ after 6 years from now and
age of βCβ 8 years ago from now is 7:4, respectively. The present age of βCβ is 30% of the present age of βAβ. If present age of βAβ is 40 years then find the present age of βBβ.Solution
Given Data: Present age of A=40, Present age of C=0.3Γ40=12, Ratio of B's age after 6 years to C's age 8 years ago is 7:4. Equation:  
Substituting C=12:
 
Solve for B + 6 = 7 βΉ B = 1.
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