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- The product of the ages of Anusha and Nisha is 300.
Question 1:
The product of the ages of Anusha and Nisha is 300. If twice the age of Anusha is more than Nisha’s age by 10 years,then find Anusha’s age?
A. 19 years
B. 23 years
C. 15 years
Feedback Let the age of Anusha and Nisha be x and y respectively,
x*y = 300
2*x = y + 10
X = (y + 10)/2
[(y + 10)/2]*y = 300
Y2 + 10y = 600
Y2 + 10y – 600 = 0
(y – 20) (y + 30) = 0
Y = 20, -30 (-30 will be eliminated)
Anusha’s age = 300/20 = 15 years
x*y = 300
2*x = y + 10
X = (y + 10)/2
[(y + 10)/2]*y = 300
Y2 + 10y = 600
Y2 + 10y – 600 = 0
(y – 20) (y + 30) = 0
Y = 20, -30 (-30 will be eliminated)
Anusha’s age = 300/20 = 15 years
D. 16 years
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