The Earth's radius is 6,400 km. What is its circumference? (C = 2πr, π ≈ 3.14)
Answer
40192 km
How to solve it
1
Radius: 6,400 km
2
Formula: C = 2πr
3
C = 2 × 3.14 × 6,400 = 40,192 km
Hints
Use formula C = 2πr
Multiply 2 × 3.14 × 6400