Answers

2016-03-30T20:04:55+05:30
Let ankits age be x
and Nikita age be y
then according to question
x×y=240........(1)
also
2y=x+4
x=2y-4........(2)
u can solve (1) and (2) to get the answer by substitution method
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Actully i m getting confused what is the age of nikita can u solve this in detail
2016-03-30T20:08:21+05:30
Let nikita age be x and ankita's age be y
xy = 240
x = 240/y
2x + 4 = y
2 × 240/y +4 = y
480/y + 4 = y
480 + 4y = y²
y² - 4y - 480 = 0
y² - 24y + 20y - 480 = 0
y (y -24 ) + 20 (y - 24) = 0
(y-24) +(y+20) = 0
y = 24, -20
age cannot be negative
∴ ankita's age = 24 =y
x = 240/y
   = 240/24
   = 10
∴ nikta's age = 10 years

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