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In the final answer of the expression (29.2 – 20.2) (1.79 x 10⁵) / 1.37. The number of significant figures is
Options
(a) 1
(b) 2
(c) 3
(d) 4
Correct Answer:
3
Explanation:
(29−20.2)
It consists of two numbers, 29→ has two significant figures and 20.2→ has three significant figures. The final result of this expression should have Two Significant Figures
1.79 x 10⁵
In scientific notation, the number of significant figures is taken from the non-exponent part of the number. 1.79 has three significant figures.
The Least of all is 2. So, the final result must be stated in scientific notation with two significant figures.
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I also think it must be 2 but according to NCERT and other websites it is 3 thus confusing