A piece of string 25cm long goes exactly once round the edge of a plate in the form of a quadrant. Calculate the area of the quadrant. Take the value of pi to be 3.142.

Question

anonymous · Answer

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

anonymous · Answer

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