Answer: Rs. 3200
Step-by-step explanation:
Let's assume the amount of money they both had before Anushka gives Arushi a gift as "M".
After Anushka gives Arushi 1/3 of her money, Arushi has 1/3 of Anushka's money, which is (1/3)×M.
Then, Arushi spends half of her total money, which means she spends (1/2)×[(1/3)×M] = (1/6)×M.
So now Arushi has (1/3)×M - (1/6)×M = (1/6)×M left.
According to the problem statement, (1/6)×M is equal to 1600. So we can set up an equation:
(1/6)×M = 1600
Multiplying both sides by 6, we get:
M = 9600
So the total amount of money they both had initially was Rs. 9600.
We know that Anushka gave 1/3 of this money to Arushi, which is:
(1/3)×9600 = 3200
Therefore, the amount gifted to Arushi was Rs. 3200.