Question

The circumference of a wheel is 40 centimeters. If the radius of the wheel is tripled, then what will be the circumference of the new wheel?

A. 120 cm
B. 125 cm
C. 130 cm
D. 148 cm

Answer 1

A

Explanation:

Answer 2

A. 120 cm

Explanation:

The circumference formula is C = π⋅d (or C = π ⋅ 2r).

If we divide 40 by 3.14, then we get about 12.74 (38.22 when tripled).

Use the formula to find the new circumference (C = 3.14 ⋅ 38.22)

The answer is about 120.01, so A is correct.