Saved Bookmarks
| 1. |
Circumference of a circular park is 264 metres. A 3.5 metre road runs on the outside around it. Find the cost of constructing the road at R 200 per squaremetre. |
|
Answer» Circumference=264m264m=2πr2*22/7*r=264mr=(264*7/2*22)mr=42mradius of park=42m width of road=3.5mso, outer radius=42m+3.5m =45.5mnow,area of park=πr*r =22/7*42m*42m =5544sq metrewhole area=area of field+area of road=πR*R=22/7*45.5m*45.5m=6506.5sq m area of road=whole area-area of field=6506.5sq m-5544sq m=962.5sq m cost for constructing road =rupees200* area of road =rupees200*962.5 =rupees192500 answer |
|