A) 10 m
B) 30 m
C) 27.5 m
D) 20 m
Correct Answer: A
Solution :
Let the length of bamboo be x m. \[\therefore \]Length of bamboo above water \[=x-\frac{x}{10}-\frac{5x}{8}\] \[=\frac{40x-4x-25x}{40}=\frac{11x}{40}\] According to the question, \[\frac{11x}{40}=2.75\] \[\Rightarrow \] \[x=\frac{2.75\times 40}{11}=10\,\,\text{m}\]You need to login to perform this action.
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