A point lies on a circles diameter such that the distance from the point to the edge of circle is 4 times the distance from the point to the centre. What is the circles area in cm^2 if the distance from the point to edge is 5cm?
first we know that the length given has a 4:1 ratio with the remaining length of the radius so 5/4 + 5 = 25/4 = radius, the formula for the area of a circle is A=pi*(r^2) so the area is 625/16*pi.
LR
Related Maths GCSE answers
All answers ▸Find the equation of the tangent to the curve y = x√x at the point (4,6).
Work out the nth term of the sequence 3, 7, 11, 15, ...
How to do Difficult Surd Algebraic manipulation questions example: Rationalise the denominator of the expression: 1+5^(1/2) / 3+5^(1/2). Give your answer in its simplest form:
How can you calculate the distance between 2 points in a grid if they're not on the same horizontal or vertical line?