\(\sqrt {4.8 \times {{10}^{9\;}}} \) is closest in value of
সমাধান
সঠিক উত্তর: Option B
Solution:
\(\sqrt {4.8 \times {{10}^{9\;}}} \) = \(\sqrt {4.8 \times 1000 \times {{10}^{6\;}}} \)
= \(\sqrt {4800 \times {{10}^{6\;}}} = \sqrt {{{(70 \times {{10}^{3\;}})}^2}} \) [Closest value বলায় 4,800 কে 4,900 ধরা হয়েছে ]
= 70 \( \times \) 1,000 = 70,000
