Q131. Find the value of 'a' such that the straight lines (2x + 3y + 4) + a(6x - y + 12) = 0 and 7x + 5y - 4 = 0 are perpendicular to each other.Mathematics — Analytic Geometry — Question 131 of 217A. -13/29B. -29/37C. -37/42D. -42/53Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →