JEE Main 202621 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 21 January
- Shift
- Evening Shift
- Subject
- Physics
- Chapter
- Units and Dimensions
JEE Main 2026 · 21 January · Evening Shift · Physics · Units and Dimensions
Keeping the significant figures in view, the sum of the physical...
Keeping the significant figures in view, the sum of the physical quantities and 0.123 m is :
Options
- A205.3 m
- B205.333 m
- C205.33 m
- D205 m
Correct answer
A. 205.3 m
Step-by-step solution
When adding measurements, the result must be limited to the least number of decimal places among all quantities.
The measurements are: 52.01 m (2 decimal places), 153.2 m (1 decimal place), and 0.123 m (3 decimal places).
The limiting factor is 1 decimal place.
Calculating the sum: 52.01 + 153.2 + 0.123 = 205.333 m.
Rounding to 1 decimal place gives 205.3 m, which is option (1).
The measurements are: 52.01 m (2 decimal places), 153.2 m (1 decimal place), and 0.123 m (3 decimal places).
The limiting factor is 1 decimal place.
Calculating the sum: 52.01 + 153.2 + 0.123 = 205.333 m.
Rounding to 1 decimal place gives 205.3 m, which is option (1).