Question

The Large Hadron Collider at a research lab is contained in a circular tunnel with a circumference of 26.7 km. What is the radius in kilometers of the circular tunnel in terms of π?

Enter the correct answer in the box.

[ ]km

Answer 1

13.35/π km or 26.7/2π km

Explanation:

"In terms of π" means leave pi in the answer. No need to use a decimal equivalent.

The radius is half of the circumference divided by π.

Answer 2

4.2494369805536 km

Explanation:

r = 4.2494369805536km because 26.7/2π which means:

26.7 ÷ 3.14159265359 x 2 = 4.2494369805536 km.