Question

A circular grassy pot of land of diameter 42m has a path of wide 3.5 m running around it on the outside . find the cost of gravelling the path at rs4 per square metre​

Answer 1

Step-by-step explanation:

Answer:

Rs.2000.18

Step-by-step explanation:

Inner Diameter = 42 m

inner radius r = 42/2 = 21 m

Since we are given that A circular grassy plot of land has a path 3.5 m wide running around it outside.

So, outer radius R = inner radius +width = 21+3.5 = 24.5 m

Area of path outside = Outer Area - inner area

=\pi(R^2-r^2)π(R

2

−r

2

)

=3.14(24.5^2-21^2)3.14(24.5

2

−21

2

)

=500.045m^2500.045m

2

Cost of graveling of 1 square meter= rs 4

Cost of graveling of 500.045 square meter= 4*500.045= Rs.2000.18