The correct option is C 1,72,230,000
The given number is 1,72,232,646.
Step 1: Identify the place vale of the rounding digit
Here, we are rounding to ten thousands digit i.e. 3
Step 2: Look at the digit to the right of the rounding digit. Here, we want to round to the nearest ten thousands so, we would look at the thousands place i.e. 2 in 1,72,232,646.
Step 3: Here, digit that is right to the rounding digit is 2, which is less than 5. So we leave the rounding digit to as it is i.e. 3 in 1,72,232,646 and digits after 3 become zeros.
Hence, 1,72,232,646 is rounded off to nearest ten thousands as 1,72,230,000