Physics

When $$24.25\times { 10 }^{ 3 }$$ is rounded off to three significant figures, it becomes :


ANSWER

$$24.2\times { 10 }^{ 3 }$$


SOLUTION
$$24.25\times 10^{3} \rightarrow 2,4,2,5\rightarrow $$ present by it has 4 significant digits.
If the digit to be dropped is 5 or 5 followed by zeros, then preceding digit is left unchanged, if it is even.
So, up to three significant figures, the number $$=24.2\times 10^{3}$$
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