TS EAMCET 03 May 2019 Shift 2 Solved Paper

A bullet of mass 1 kg fired with a speed 2 ms−1 from x = 0 passes through a block of wood whose centre is kept at a distance of 10 m from the origin as shown hi figure. The retarding force (Fr) on the bullet within the wooden block is -0.5/x. The minimum length of the block (upto one decimal digit) required to completely stop the bullet is (Assume e4 = 55)