state gov DDA Assistant Section Officer (ASO) Mock Test 2023 Quantitative Aptitude Mensuration Plane Figures
In the figure given below, AB is a line of length 4a, with M as midpoint. Semi - circles are drawn on one side with AM and MB as diameters. A circle with centre O and radius r is drawn such that this circle touches all the three semi - circles. What is the value of r?
1
a/3
2
2a/3
3
a/4
4
3a/4