The tips of the second hand of a clock has moved a distance of 60.72m in an hour. Find the length of the second hand.
The second hand will turn 60 rounds per hour.
Length of each round = 60.72/60 = 1.012m = 101.2cm
Circumference = 2(pi)(radius)
Let rcm be the length of second hand
101.2 = 2(pi)(r)
r = 101.2/(2pi)
Use the calculator for it ;D
