Let each side of a square is 20 cm. Four equal
circles, each of radius 10 cm are drawn about the four corners of the square so
that each touches two of the others. Find the area enclosed between the
circumferences of the circles?

(1)86 sq.cm (2)314
sq.cm (3)78 sq.cm (4)none of these

**For answer click on "Read more" below:****Solution:**
Given that radius of circle = 10 cm; Length of side of square = 20 cm;

Area of the shaded region = Area of the square –
4(Area of each quarter circle)
=
(20

^{2}) – 4(π*10^{2}/4)
=
400 – (3.14*100) = 400 – 314 =

**86****Answer (1)**

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