A) 5m
B) 6m
C) 7m
D) 8m
Correct Answer: C
Solution :
[c] Final energy \[=\frac{70}{100}\] Initial energy \[mg{{h}_{2}}=\frac{7}{10}mg{{h}_{1}}\] \[\therefore \,\,{{h}_{2}}=\frac{7}{10}{{h}_{1}}=7\,m\]You need to login to perform this action.
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