SOLUTION: A man-hole on a drainage pipe is covered with an iron-plate, which is of the shape of a square of side 12.5 cm. From this iron-plate, a circular disc of diameter 7 cm is painted i

Question 1024685: A man-hole on a drainage pipe is covered with an iron-plate, which is of the shape of a square of side
12.5 cm. From this iron-plate, a circular disc of diameter 7 cm is painted in black colour. The remaining
part is painted with blue colour paint. Find the blue paint required, if 1cm2 requires 0.8 g of paint. (Use
22
7
p 5 )
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
side=12.5cm; r=(1/2)diameter)=3.5cm
.

.
(Area of square)-(area of circle)=(area of blue)
.

.
I have no idea what:
22
7
p 5)
means.
.

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