Use Pythagorean's Theorem to find the length of x.

so

and

. We can simplify that radicand down into a perfect square times a prime number, and that is

. 4 is a perfect square that can be pulled out as a 2, so the length of x is

, the choice on the top right.
Answer:
the duration of the flight be 1 hour
Step-by-step explanation:
The computation of the duration of the flight is shown below:
Let us assume the duration of the flight be x hours
Now the equation would be
600 ÷ x - 600 x + (1 ÷ 2) = 200
600 ÷ x - 1200 ÷ 2x + 1 = 200
x(2x + 1) = 3
2x² + x - 3 = 0
(2x + 3)(x - 1) = 0
x = 1 hour
hence, the duration of the flight be 1 hour
The same is to be considered
You or we keep only those receipts
1. The receipt of those goods which has high transaction value, so that if there is a mismatch, at that time you can help the financial authorities or System.
2. We keep those receipts of goods,which are under warranty period or for which you are paying EMI.
3. Receipt of those goods which has very high amount printed on it, and it mismatch with our income ,i.e not correlated with our income Someone can make false claim to entangle you.