a rectangular lawn measuring 30 meter by 28 meter is to be surrounded externally by a uniform path which is 2 meter wide. Find the cost of levelling the path at the rate. of rupees 25 per square meter
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area of rectangular lawn = l×b
=30×28
=840m sq.
area of rectangular lawn including path
=(l+2)/(b+2)
=(30+2)/(28+2)
=32×30
=960m sq.
area of path = area of lawn including path- area of lawn
=960-840
=120m sq.
cost of leveling @rupees/m sq.=25×120
=3000rupees
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