1.

Consider a three dimensional Cartesian system with origin at O and three rectangular coordinate axes x,y and z-axis. Suppose that the distance between two points P and Q in the space having their coordinates (x _(1), y_(1), z _(1)) and (x _(2), y _(2), z _(2)) respectively be defined by the following formula d (P,Q) =|x_(2)-x_(1)|+ |y_(2)-y_(1)|+ |z _(2) -z_(1)| Although the rormula of distance between two points has been defined in a new way, yet the other definition remain same (like section formula, direction consines ets). So, in general equations of straight line in space, plane in spece remain unchanged. Locus of point P if d (O,P) = k, where ,k is a positive constnat number, represents

Answer»

a sphere of radius K
a set of eight planes FORMING an octhedron
a set of eight planes forming HEXAGONAL PRISM
an infinite cylinder of radius k

Answer :B


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