SOLUTION: a is 4 yrs old and b is thrice a when a is 12 yrs how old will b be?

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Question 327021: a is 4 yrs old and b is thrice a when a is 12 yrs how old will b be?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
a= 4 years
b = 3times a= 12 years
a will be 12 after 8 years
when a will be 12 years b will be 12 + 8 = 20 years