Question

The diameter of a circular garden is 100 metres.There is a 3m wide white flowers area running around its inside.Find its area and the cost of planting white flowers if cost of plating them is Rs.20 per square metre

Answer 1

total area=62800
divide it by 3 and multiply with 20 you get the answer

Answer 2

4186

Answer 3

is it right?

Answer 4

radius of garden (r1) = 50m
radius of garden including flowers area (r2) = 103/2 m

Area of flower area = Area of garden including flowers area - Area of garden
= \[\pi (r2)^{2}-\pi (r1)^2\]taking pi common,
\[\pi [(r2)^{2}- (r1)^2]\]
\[\pi (r2+r1)(r2-r1)\]
=22/7 * 203/2 * 3/2
= 478.5 sq. m

Cost of painting = Rs.20/sq. m
Cost of painting 478.5sq. m = Rs20*478.5 = Rs 9570

Answer 5

thank you :)

Answer 6

oh!! well my answer was wrong i ddnt assumed a flower as an individual circle
please consider the other1

Answer 7

its allright!