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Numerical Ability
Co-ordinate geometry
Of the four straight lines A, B, C, D find out which pair forms an orthogonal set
A: 5x+4y-7 = 0, B: y = -x , C: y = 7x+3, D: 4x = 5y+5
(a)AD (b) AC (c) BC (d) BD (e)AB
Read Solution (Total 2)
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- slope of line A is -(5/4)
slope of line B is(-1)
slope of line C is(7)
slope of line D is(4/5)
for orthogonality (slope of line 1)*(slope of line 2)= -1
hence ans is AD. - 5 years agoHelpfull: Yes(4) No(0)
- AD is the correct pair.
the product of the slopes the two orthogonal lines is -1. - 5 years agoHelpfull: Yes(0) No(0)
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