The distance of the point having position vector −^i+2^j+6^k from the straight line passing through the point (2,3,−4) and parallel to the vector, 6^i+3^j−4^k is :
A
6
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B
7
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C
2√13
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D
4√3
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Solution
The correct option is B7 Given, →n=6^i+3^j−4^k −−→PQ=−3^i−^j+10^k PR=∣∣
∣∣−−→PQ⋅→n|→n|∣∣
∣∣=61√61=√61 PQ=√110