Question

grass is planted on a circular strip of width 7m.the radius of the inner edge of grass strip is 21cm.the cost of planting is rs.4 per square meter.then find the total cost of planting grass​

Answer 1

I think it's answer should be 8428

Step-by-step explanation:

because total area along width and radius with inner age =7m+ 2100m = 2107

cost of planting is = Rs 4 per square meter

for Rs 2107 = 2107×4 = 8428

Answer 2

Answer:

Give that,

CSA of cylinder =

$2\pi \: rh$

r= 21

h=7

$2 \times \frac{22}{7} \times 21 \times 7 \\ = 924cm {}^{2}$

Cost of planting is rs.4 square meter

CAS×4

$925 \times 4 \\ = > 3696 rs$

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