The correct option is
D 432.64
To open the safe lock, we have to find out the hundreds and tenths places with the help of the clues given in the question.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1137954/original_Screenshot_2021-05-21_090232.png)
According to the first given clue, let us double the digit in tens place to identify the digit in tenths place.
Digit at the tens place = 3
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1137992/original_Screenshot_2021-05-21_093701.png)
∴ The digit at the tenths place is:
3
× 2 = 6
Now, according to the second given clue, let us keep the hundreds place same as the hundredths place.
Digit at the hundredths place = 4
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1137998/original_Screenshot_2021-05-21_094443.png)
This gives the digit at the hundreds place as 4.
Hence, the safe lock number is 432.64.