Question

the length and breadth of a park are in the ratio 2 : 1 and its perimeter is 240 m. a path 2 m wide runs inside it , along its boundary. find the cost of paving the path at rs 3 per m 2 hint. let the length _ 2x m and the breadth _ x m . then, 2( 2x +x ) _ 240 x _ 40
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Answer 1

l = 2x

b =x

Perimeter=2(l+b)

240m=2(2x+x)

240m=6x

x=40 m.

length=80m

breadth=40m

without path,

l=76m

b=36m

perimeter=2*112m

=224 m

cost=₹3*224

=₹672.

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