• # question_answer There is a ratio of 5 : 4 between two numbers. If 40 % of the first number is 12 then what would be the 50% of the second number? A)  12       B)         24C)  18                   D)  None of these.

Correct Answer: A

Solution :

[a] Let the required numbers are 5x and 4x Then $5x\times \frac{40}{100}=12$ $\Rightarrow x=\frac{12\times 100}{5\times 40}=6$ 50% of second number$=4x\times \frac{50}{100}$ $=4\times 6\times \frac{1}{2}=12$

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