One of the important question for the board exam class 10 from
mensuration chapter.This question is from r d sharma class 10 maths.
chapter-15.4 question number-17 maths r d sharma,mensuration.
In this question we have to find the circumference of the central
part and the perimeter of the part ABEF given that the square ABCD
is divided into five equal parts, all having same area. The central
part is circular and the lines AE, GC, BF and HD lie along the
diagonals AC and BD of the square. If AB = 22 cm.