The tip of the hand travels the circumference of a circle with radius (r) 9.5 cm every hour; The formula for circumference of a circle (c) is: c = πd = 2πr So, for a circle with radius 9.5, the circumference is: c = 2π(9.5) = 19π cm The tip travels 19π cm every hour, so in a day of 24 hours it will travel: 24 * 19π = 456π cm (= 1432.566... ⇒ 1432.6 cm)
