A) \[28\,\,m\]
B) \[8\,\,m\]
C) \[12\,\,m\]
D) \[20\,\,m\]
Correct Answer: C
Solution :
Let \[{{h}_{2}}\] be the height to which ball rebounds. Given,\[%\] loss of energy \[=\frac{mg{{h}_{1}}-mg{{h}_{2}}}{mg{{h}_{1}}}\times 100\], \[40=\frac{20-{{h}_{2}}}{20}\times 100\]You need to login to perform this action.
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