Question

When Kareena is x years old, her sister Karishma is y years old. Which of the following will remain CONSTANT with respect to time?
(a) x+y
(b) xy
(c) x:y
(d)x-y

Answer 1

Answer:

c) x:y

since the ratio of their ages will be same

Answer 2

Given: Kareena age= x

Karishma age = y

To find :- constant value w.r.t Time

Both of them will grow at same rate.

for example

current age difference = x-y

after z years,

Kareena's age = x+z

Karishma's age = y+z

their age difference will still be x-y.

Therefore, x-y will remain constant with respect to time.