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.

Area of a circle = π r²

r = (1/2) d = (1/2) * 140 = 70

area         = π * (70)²

                = 4900 π cm²

SM

Related Maths GCSE answers

All answers ▸

Rearrange the formula to make 'y' the subject: x = (1 - 2y)/(3 +4y)


Solve the simultaneous equations 3x+2y=13 and 4x+y=14


Solve algebraically the simultaneous equations: x^2 + y^2 = 25 and y - 3x = 13


Find the co-ordinates where the curve y= 2x^2 + 7x + 3 crosses the x axis