Question #20106

1 Answer
Jan 28, 2017

d=4.058d=4.058 (3dp)(3dp)

Explanation:

Equation relating the circumference and diameter of a circle:

pi =C/dπ=Cd

Substitute in C = 12.75C=12.75

pi =12.75/dπ=12.75d

Rearrange to make dd the subject:

d =12.75/pid=12.75π

Enter into a calculator and you get: d=4.058d=4.058 (3dp)(3dp)