A circular table top has diameter 140 cm. Calculate the area of the table top in cm² , giving your answer as a multiple of π.
So we know the formula for the area of a circle: πr2
So all we need to find is the radius2
Radius = Diameter / 2 (Half the diameter)
= 70
Radius2 = 702
= 4900
Therefore using our original equation: πr2
The area of the table = 4900π (This is our final answer as the question asked for a multiple of π)
LM
Related Maths GCSE answers
All answers ▸How to derive the formula for a geometric series sum
Solve: x^2 + x - 12 = 0
Find the equation of the straight line which passes through the point (0, 3) and is perpendicular to the straight line with equation y = 2x.
A different pattern is made using 20 straight lines and 16 arcs. The straight lines and arcs are made of metal. 20 straight lines cost £12 and the cost of one straight line: cost of one arc = 2:3. Work out the total cost of metal in the pattern.