Question

हाउ मेनी टाइप्स ऑफ 20 सेंटीमीटर इन टू 20 सेंटीमीटर विच विल बे रिक्वायर्ड टो हैव ए फुटपाथ ऑफ 1 मीटर वायर अंडरग्राउंड वॉटर फ्लो 28 मीटर इन 20 मीटर​

Answer 1

change the square is inscribed in the circle therefore the square is perpendicular bisector from the centre of the circle therefore distance from O to perpendicular to ab will be the half of one side of the square .

side of square is equal to root area is equal to

$\sqrt{50}$

and the value of root 50 will be equal to 7.1 units .

Pythagoras theorem we can find the radius of the circle.

from the centre of circle which is 7/2 is equal to 3.5

this means that square of the radius is equal to

49 + 12.25

therefore :- the value of radius = √ 61.25

= 7.8 units

therefore the radius of the square will be 7.8 units