A piece of string 25cm long goes exactly once round the edge of a plate in the firm of a quadrant

Question

Mathematics

Talia Mcintosh

28 August, 05:56

A piece of string 25cm long goes exactly once round the edge of a plate in the firm of a quadrant

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Bush · Answer 1

Well i assume it is a quarter of a plate so what is the area of a quarter circle? whole circum.=2*pi*r so a quarter = (2*pi*r) / 4 = (pi*r) / 2 = 25 (given) so pi*r=50 ... so r=50/pi put this in the area formula pi (50/pi) ^2=2500/pi = 796