Question

The rim of the volcanic crater shown below is a circle. The diameter is 680 m. What is the circumference of the rim of the crater in kilometres (km)? Give your answer to 1 d.p.​

Answer 1

Explanation:

The circumference of a circle can be calculated using the formula C = πd, where d is the diameter of the circle and π is the mathematical constant pi (approximately 3.14).

In this case, the diameter of the crater is 680 m. So, the circumference can be calculated as:

C = πd = 3.14 × 680 = 2139.2 m

To convert this to kilometers, we can divide by 1000:

C = 2139.2 m ÷ 1000 = 2.1392 km

Rounding this to one decimal place, the circumference of the rim of the crater is approximately 2.1 km.