Question

From a metallic plate , which is a square of side 10 cm , a circular disc of diameter 3.5 cm is cut of. Find the weight of the remaining part if 1 sq cm of the plate weights 5 gm.

Answer 1

Area of square=L^2
A=10*10=100sq.cm
Area of circle =pie r^2
A c=(22/7)3.5*3.5=38.5sq cm

Now, 100-35=65
Mass of remaining =65*5=325