\(\frac{\sqrt{2}}{7}cm\)
\(3\frac{1}{2}cm\)
7cm
\(7\sqrt{2}cm\)
Correct answer is D
\(A=\pi r^2 \Rightarrow 77 = \frac{22}{7} \times \frac{r^2}{1}\Rightarrow r^2 = \frac{77\times 7}{22} \Rightarrow r^2 = \frac{49}{2}\\
\Rightarrow r = \sqrt{\frac{49}{2}}=\frac{7}{\sqrt{2}}. Since D = 2r ∴ D = 2 \times \frac{7}{\sqrt{2}} = \frac{14}{\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}} = 7\sqrt{2}cm\)
In the diagram, O is the centre of the circle. If < NLM = 74\(^o\), < LMN = 39\(^o\) and < ...
The chord ST of a circle is equal to the radius, r, of the circle. Find the length of arc ST. ...
If sin x = \(\frac{5}{13}\) and 0o \(\leq\) x \(\leq\) 90o, find the value of (cos x - tan x)...
If log 10 to base 8 = X, evaluate log 5 to base 8 in terms of X. ...