Question

The underground tunnel of the Large Hadron Collider forms a giant circle with a radius of 4.24 kilometers. (C = 2πτ)
What is the circumference of the tunnel?
Express your answer in terms of π.
8.48
π kilometers
4.24 km
7
8 9
4
5
6
1
2
3
0
(-)
ㅁㅁ
X
X
What is an approximation of the circumference of the tunnel to the nearest kilometer?
(π≈ 3.14)
C
kilometers

Answer 1

C = 2πr = 2π(4.24) = 8.48π kilometers.

Using π ≈ 3.14: C ≈ 8.48 × 3.14 = 26.6272 ≈ 27 kilometers.