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The product of Sita's age 5 years ago and her age 8 years later is 30. Her present age (in years) is:

Class 10Quadratic Word ProblemsAlgebra — Quadratics

A7
B5
C6
D8

Step-by-Step Solution

(x - 5) (x + 8) = 30, x^{2} + 3 x - 40 = 30, x^{2} + 3 x - 70 = 0, (x + 10) (x - 7) = 0

. Present age = 7.

Answer: A) 7

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