A field is 4cm long and 25m wide. It has a path of 2m wide inside along its sides. Find the area of path and the cost of constructing the path at rupee 3.20 per sq m.
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outer rectangle
length=4cm
=4/1000m=0.004m
breadth=25m
wide=2m
inner rectangle
length=4/1000-2
=-1.996m
breadth=25-2m
=23m
area of the path=area of outer rectangle-area of inner rectangle
area of outer rectangle=4/1000×25m2
=0.1m2
area of inner rectangle=-1.996×23m2
=-45.9m2
area of pathway=0.1+45.9
=46m2
cost of constructing 1m2=3.20
cost of constructing 46m2=46×3.20 =147.20rs
length=4cm
=4/1000m=0.004m
breadth=25m
wide=2m
inner rectangle
length=4/1000-2
=-1.996m
breadth=25-2m
=23m
area of the path=area of outer rectangle-area of inner rectangle
area of outer rectangle=4/1000×25m2
=0.1m2
area of inner rectangle=-1.996×23m2
=-45.9m2
area of pathway=0.1+45.9
=46m2
cost of constructing 1m2=3.20
cost of constructing 46m2=46×3.20 =147.20rs
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