Question

the length and breadth of a rectangle is 80cm and 40cm respectively.four square of side 5cm each are removed from its four corners. find the remaining area
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Answer 1

1)given

length of rectangle =80

breadth of rectangle =40

perimeter =2×l+b

=2×80+40

=2×120

=240

2)given

side of square =5

perimeter =s×s

=5×5

=25

perimeter of rectangle-perimeter of triangle =area

240-25=area

215=area