A) \[1\,\,m\]
B) \[19\,\,m\]
C) \[50\,\,m\]
D) \[75\,m\]
Correct Answer: A
Solution :
\[{{S}_{n}}=u-\frac{a}{2}(2n-1)\]\[=10-\frac{2}{2}(2\times 5-1)=1\ meter\]
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