Question

The diameter of each circular hole in a paint palette is 42 millimeters.

Find the circumference of each hole. Use 3.14 as an approximation for .
A 128 millimeters
B 131.88 millimeters
C 120 millimeters
D 42 millimeters

Answer 1

B

Explanation:

the circumference of a circle is

2×pi×r

with r being the radius (half the diameter).

2r is then the diameter.

so, in our case the circumference is

42×pi = 42 × 3.14 = 131.88 mm

Answer 2

B

Explanation:

The circumference is just diameter x π (3.14 in this case) so 42 x 3.14 = 131.88