A garden 150 m long and 80 m wide has a road 4 m wide all around on the outside find the cost of paving the road at the rate of rs 120 per square metre
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internal area = 150x80=, 12000
external length=150+4=154
external breadth=80+4=84
external area= 154x84=12936
area of path= 12936-12000=936
total cost =rs 120x936=rs112320
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