Answer:
see explanation
Explanation:
(a)
Since there are 360° in the complete pie chart the 40° represents
360° ÷ 40° = 9 parts of the chart
Since 40° represents 7 cars then there are a total of
9 × 7 = 63 cars in the car park
(b)
The circumference (C) of a circle is calculated as
C = πd ( d is the diameter )
Given C = 28 , then
πd = 28 ( divide both sides by π )
d =
