MathematicsHard128×since 2002Q5507Let two straight lines drawn from the origin O\mathrm{O}O intersect the line 3x+4y=123 x+4 y=123x+4y=12 at the points P\mathrm{P}P and Q\mathrm{Q}Q such that △OPQ\triangle \mathrm{OPQ}△OPQ is an isosceles triangle and ∠POQ=90∘\angle \mathrm{POQ}=90^{\circ}∠POQ=90∘. If l=OP2+PQ2+QO2l=\mathrm{OP}^2+\mathrm{PQ}^2+\mathrm{QO}^2l=OP2+PQ2+QO2, then the greatest integer less than or equal to lll is :A42B46C48D44Check answerSkip