Question

Please can anyone say 0.2 × 10-⁶ kaise aaya .

because 0.25 approx value . kya hai ...

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Answer 1

$\Large{ \mathbb{SIMPLIFICATION}} :$

$\begin{aligned}& \frac{\pi}{4} (0.5 \times {10}^{ - 3} ) {}^{2} \quad \sf\red{ {m}^{2} }\\ \\ = \: & \frac{\pi}{4} {(0.5)}^{2} \times {( {10}^{ - 3}) }^{2} \quad \sf\red{ {m}^{2} }\\ \\ = \:& \frac{\pi}{4} \times 0.25 \times {10}^{ - 6} \quad \sf\red{ {m}^{2} } \\ \\ = \: & \frac{ {}^{11} \cancel{22}}{7} \times \frac{1}{ \cancel4 _{2} } \times \frac{ {}^{1} \cancel{25}}{ \cancel{100} _{4}} \times {10}^{ - 6} \quad \sf\red{ {m}^{2} } \\ \\ = \: & \frac{11}{56} \times {10}^{ - 6} \quad \sf\red{ {m}^{2} } \\ \\ = \: &0.196 \times {10}^{ - 6} \quad \sf\red{ {m}^{2} } \\ \\ = \: &0.2 \times {10}^{ - 6} \quad \sf\red{ {m}^{2} } \qquad(apporox) \end{aligned}$

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