the circular Park of radius 42 metre has a 7 metre wide around it find the cost of cementing the road at Rs 12 per square metre
Answers
Answered by
0
Step-by-step explanation:
in this question we should subtract the inner area of circle from total area to get area of road
total area of circle=π×r^2
=22/7×42^2.
=22/7×1764=22×252=5544sq.m
now the radius of inner circle=42-7=35
area of inner circle =22/7*35^2
=22/7*1225=22*175=3850m.sq
outer circle-inner circle=5544-3850=1694sq.m
area of road =1694sq.m
Similar questions