Question

the circumference of a circular Park is 314 m.A 20 metre wide concrete track is made around it calculate the cost of laying turf in the park at rupees 1.25 per square metre and the rate of concreting track is 50 per square metre (use pie= 3.14)​

Answer 1

The cost of laying turf in the park is Rs.9812.5 and the cost of concreting path is Rs.376800

Step-by-step explanation:

Circumference of circular park =$2 \pi r = 2 \times \frac{22}{7} \times r$

We are given that the circumference of a circular Park is 314 m

So,$2 \times 3.14 \times r =314$

$r=\frac{314 }{2 \times 3.14}$

r=50

Area of park =$\pi r^2 = 3.14 \times 50^2 = 7850 sq.m.$

Cost of laying turf in park in 1 sq.m. = Rs.1.25

Cost of laying turf in 7850 sq.m. =$1.25 \times 7850 =Rs.9812.5$

A 20 metre wide concrete track is made around it

Outer radius = 50 m +20 m = 70 m

Area of track = Outer area - Inner area = $\pi R^2 - \pi r^2 = 3.14(70^2-50^2)=7536 sq.m.$

Cost of concreting 1 sq.m. path = Rs.50

Cost of concreting 7536 sq.m. path = $Rs.50 \times 7536=Rs.376800$

Hence the cost of laying turf in the park is Rs.9812.5 and the cost of concreting path is Rs.376800

#Learn more:

The outer circumference of a circular track is 220m.The track is 7 metre wide everywhere.Calculate the cost of levelling the track at the rate of 50 paise per square metre.

https://brainly.in/question/6163484

Answer 2

Step-by-step explanation:

Hope it helps you...

Its the answer of first part..