A lamp is put on one corner of a square plot of side 50m. It's light reaches 21m. Find the area of that plot that is lit by that lamp? Choose the most appropriate option:
A) 248	B) 312.5	C) 346.5	D) 392.5	E) 424
Area covered by lamp = Pi*r^2/4 ( here we divide by 4 because lamp is put in the corner of the plot and only 1/4 part lit is of the plot)   where r= 21 m = length of part lit   So area = (22/7)*21*21/4= 
<gadget id="calculator">(22/7)*21*21/4</gadget>
<output>693/2 = around 346.5</output>
346.5 sq m   answer :346.5
<result>C</result>
A lamp is put on one corner of a square plot of side 50m. It's light reaches 21m. Find the area of that plot that is lit by that lamp?