snusrat
snusrat snusrat
  • 24-10-2016
  • Mathematics
contestada

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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HeavenlyHelper
HeavenlyHelper HeavenlyHelper
  • 24-10-2016
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
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