SOLUTION: Krishna, twelve years old, is three times as old as his brother. How old will Krishna be when he is twice as old as his brother?
6
8
12
16
18
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Question 830263: Krishna, twelve years old, is three times as old as his brother. How old will Krishna be when he is twice as old as his brother?
6
8
12
16
18
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
Let x be the brother's age.
We're given the information that 12 = 3x (three times as old as his brother).
Therefore, his brother is currently 4. (12/3=4)
When brother is 6, Kris will be 14 (4+2; 12+2)
When brother is 7, Kris will be 15 (4+3; 12+3)
When brother is 8, Kris will be 16 (4+4; 12+4)
When brother is 9, Kris will be 17 (4+5; 12+5)
and so on and so forth.
.
The correct answer here is "16", 4 years from now.
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