Question

The diametet of a circular park is 24 m .A 3 m wide path runs around it from inside.find the cost of paving the path at Rs 25 per square meter

Answer 1

diameter=24m then its radius=24/2=12m=outer radius,
inner radius=24 - 2(3)=18m(width of path 3m laid on both sides)
Area=Π(R+r)(R-r)=3.14×42×6=791.28sq.m
the total cost=791.28×25=₹.19782