A rectangular swimming pool has dimensions 45 m by 20 m. A concrete path 3.5 m wide is laid round it. Find the cost of laying the path at a rate of 25 per m.
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first we calculate the are of the swimming pool:
L=45m
B=20m
Area= LxB
=45x20
=900 sq.m
Now we calculate the area of the concrete path around the path. The new dimensions include the width 3.5m on both sides. Therefore,
L= 45+3.5+3.5= 52m
W= 20+3.5+3.5= 27m
Area= LxB
=52x27
=1404 sq.m
Area of the path only= 1404-900
= 504 sq.m
Now the cost
Cost per sq.m= 25 rs
total cost= 25x504
=12600 rs.
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