A) \[h\left[ \sqrt{\frac{2}{gh}}+\frac{1}{c} \right]\]
B) \[h\left[ \sqrt{\frac{2}{gh}}-\frac{1}{c} \right]\]
C) \[h\left[ \frac{2}{g}+\frac{1}{c} \right]\]
D) \[h\left[ \frac{2}{g}-\frac{1}{c} \right]\]
Correct Answer: A
Solution :
Time of fall \[=\sqrt{\frac{2h}{g}}\] Time taken by the sound to come out \[=\frac{h}{c}\] Total Time= \[\sqrt{\frac{2h}{g}}+\frac{h}{c}=h\left[ \sqrt{\frac{2}{hg}}+\frac{1}{c} \right]\]You need to login to perform this action.
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