Question

The diameter of a circular park is 42m. A 3.5 m wide path lies along the periphery of the park . Find the cost of paving the path at the rate of ₹20 per m​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Radius of path(r) = 42/2 m

= 21 cm

radius of path with paving(R) = 21+3.5 m

= 24.5 m

Area of paved path = π( R2 - r2 )

=

$22 \div 7(24.5 ^{2} - 21^{2} )$

= 22/7( 600.5 - 441)

=22/7 (59.25)

= 22* 8.46

=186.12 m square

cost of paving = ₹186.12* 20

= ₹3722.4