Question

A semicircular ground of radius 17·5 m is to be fenced with
wire. Find the cost of wiring at the rate of < 30 per metre.

Answer 1

Answer:

Circumference of circle = 2pi r

Circumference of semi circle = 2pi r/2 = pi r = 22/7*17.5 = 55m

Cost of wiring = Rs.30/m

Cost of wiring semicircular ground = 30*55 = Rs.1650