MathematicsHard249×since 2002Q2579A plane passes through the points A(1, 2, 3), B(2, 3, 1) and C(2, 4, 2). If O is the origin and P is (2, −-−1, 1), then the projection of OP→\overrightarrow {OP}OP on this plane is of length :A27\sqrt {{2 \over 7}}72B25\sqrt {{2 \over 5}}52C23\sqrt {{2 \over 3}}32D211\sqrt {{2 \over 11}}112Check answerSkip