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Choose the correctanswer. The planes 2x-y+4z=5 and 5x-2.5y+10z=6 area)perpendicularb)parallelc)intersect y-axisd)passes through (0, 0, 5/4)

Answer»

perpendicular
parallel,
INTERSECT y-axis,
passes through (0, 0, 5/4)

Answer :Since `2/3 = (-1)/-2.5 = 4/10 = 1/2.5`, the DIRECTION ratios of the NORMALS to the GIVEN planes are proportional
`therefore` Th normals are parallel. Hence, the planes are parallel
`threfore` The answer is (B)


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