A) 19/18
B) 20/19
C) 21/20
D) 18/17
Correct Answer: A
Solution :
| [a] \[{{f}_{2}}={{f}_{0}}\,\left( \frac{v}{v-17} \right)\,\] |
| \[{{f}_{1}}={{f}_{0}}\,\left( \frac{v}{v-34} \right)\,\] |
| \[\frac{{{f}_{2}}}{{{f}_{1}}}\,\,=\,\,\frac{v-34}{v-17}\,=\,\frac{340-34}{340-17}\,\,=\,\,\frac{306}{323}\,\,=\,\,\frac{18}{19}\] |
| \[\frac{{{f}_{1}}}{{{f}_{2}}}\,\,=\,\,\,\frac{19}{18}\] |
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