A) 36 km
B) 240 km
C) 8 km
D) Data inadequate
Correct Answer: C
Solution :
1st day =4 km, 2nd day \[=4\times \frac{1}{2}=2\]km, 3rd day\[=2\times \frac{1}{2}=1\]km \[\therefore \]Total distance \[S=4+2+1+\frac{1}{2}+\frac{1}{4}+...\] Which is infinite GP with \[a=4,\]\[r=\frac{1}{2}\] So, \[S=\frac{a}{1-r}=\frac{4}{1-\frac{1}{2}}=\frac{4}{\frac{1}{2}}=8\]kmYou need to login to perform this action.
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