Question

1. A circular hole of diameter 4cm is cut out of a rectangular plate of dimensions 10cm by 8cm .Find the area of the plate after the hole has been cut out.​

Answer 1

area of the plate after the hole has been cut out= 67.44 cm^2

Given,

length of rectangular plate= 10cm

the breadth of rectangular plate = 8cm

the radius of circle= diameter/2=4/2=2cm

First, we will find the area of the rectangular plate and then subtract the area of a circular hole from it.

area of rectangular plate=10*8= 80cm^2

area of circular hole = πr^2= 3.14*2*2= 12.56 cm^2

area of the plate after the hole has been cut out

= 80-12.56

=67.44 cm^2

Answer 2

Answer:

Rs.1152

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