A) 80 cm
B) 75 cm
C) 67 cm
D) 50 cm
Correct Answer: C
Solution :
[c] As \[\frac{x}{y}=\frac{40}{100-40}=\frac{40}{60}\] |
\[\frac{3x}{y}=3\left( \frac{40}{60} \right)=\frac{120}{60}=\frac{2}{1}\] |
Now, the total length = 100 |
\[\therefore \] Required length \[=\frac{100}{3}\times 2=67\,m\]. |
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