42) A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 Years. The sum is

43) The cutting edge of a chisel should be

44) The main purpose of boring operation is to

45) If the diameter of a hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is

46) In conic sections, a double ordinate that passes through the focus is called