Answer:
B
Step-by-step explanation:
A chord is a line segment joining two points on any curve, for instance, an ellipse. A chord that passes through a circle's center point is the circle's diameter. Don't get this confused for diameter. The diameter is P to R.
Given
Required
Determine P(Gray and Blue)
Using probability formula;
Calculating P(Gray)
Substitute these values on the given formula
Answer: 10.8 km per min