1.

The present ages of 3 brothers are in the proportion 3 ∶ 4 ∶ 5. After 10 years the sum of their ages will be 78. What are their ages now?

A. 12, 16 and 20
B. 15, 20 and 25
C. 21, 28 and 35
D. 24, 32 and 40
Answer» B. 15, 20 and 25


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