Question

the diameter of a circular park is
24m . A 3m wide path runs around it from inside .Find the cost of paving the path at rupees 25 per square meter

Answer 1

D=24m

radius R = 24/2=12m

inner radius r = 12-3=9m

area of path = 3.14 * ( 12+9)(12-9)

= 3.14*21*9= 593.46sq m

cost = 593.46*25=rs14836.50

Answer 2

Answer:

4950

Step-by-step explanation:

Let the diameter of the

circular park ( D ) = 24 m

Radius of the park ( R ) = D/2

R = 24 /2 = 12 m

If the width of the path inside the

park ( w ) = 3m

Radius of the inside circle (r ) = R - w

r = 12 - 3 = 9 m

Area of the path ( A ) = πR² - πr²

A = π(R + r ) (R - r )

= π ( R + r ) w

= ( 22 /7 ) ( 12 + 9 ) ( 3 )

= 22 × 3 × 3

A = 198m²

Cost of the paving the per square

meter = Rs 25

Cost of paving total area of the path

=25 × 198

= Rs4950

I hope this helps you.

:)