Maharashtra BoardEnglish MediumSTD 8MathsSquares and Square Roots3 Marks
Question
Using square root table, find the square root:
13.21
✓
Answer
From the square root table, we have,
$\sqrt{13}=3.606$ and $\sqrt{14}=\sqrt{2}\times\sqrt{7}=3.742$
Their difference is 0.136
Thus, for the difference of 1 (14 - 13), the difference in the values of the square roots is 0.136
For the difference of 0.21, the difference in the values of their square roots is,
0.136 × 0.21 = 0.02856
$\therefore\sqrt{13.21}=3.606+0.02856\approx3.635$
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