Question
Question: Area of circle if longest chord y = 2x intersect circle at points whose ordinates are 6 & –2 :...
Area of circle if longest chord y = 2x intersect circle at points whose ordinates are 6 & –2 :
A
12.5p
B
10p
C
15p
D
20p
Answer
20p
Explanation
Solution
Let points are A(3, 6), B(–1, –2)
Area = pr2 = 4πAB2= 4π×80 = 20p