Question

Product of Ashwinis age 5 years ago and 10 years hence is 150. Find her present
age.
​

Answer 1

Answer:

this is the answer

• Ashwani age is x

Answer 2

Ashwini's present age is 20 years.

Step-by-step explanation:

Let Ashwini's present age is x years.

Before 5 years her age = (x - 5) years

Before 10 years her age = (x - 10) years

"Product of her age before 5 years and 10 years is 150".

(x - 5)(x - 10) = 150

x² - 5x - 10x + 50 = 150

x² - 15x  + 50 - 150 = 0

x² - 15x - 100 = 0

x² - 20x + 5x - 100 = 0

x(x - 20) + 5(x - 20) = 0

(x + 5)(x - 20) = 0

x = -5 and 20

But age can not be negative.

Therefore, her present age is 20 years.

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