Question

 In an experiment to determine the value of pi, a cylinder is measured to have an average value of 4.25 cm for its diameter and an average of 13.39 cm for its circumference. what is the experimental value of pi to the correct number of significant figures?

Answer 1

Those measurements give an experimental value of 3.15 for pi.

Answer 2

Diameter = 4.25 cm
Circumference = 13.39 cm
Radius = 4.25 ÷ 2 = 2.125 cm
2 pi r = 13.39. 2×pi× 2.125 = 13.39 pi = 3.15 Hope it helped!