Question
A spiral is made up of 13 successive semi-circles with centre at X and Y, starting with centre at X. The radii of semi-circles thus developed are 0.5 cm, 1.0 cm, 1.5 cm and 2.0 cm and so on. The total length in the spiral is
- A) 144 cm
- B) 143 cm
- C) 174 cm
- D) 194 cm
- E) None of these
