Question

the gardener wants to fence a circular garden of diameter 21 m.find the length of rope ge needs to purchase ,if he make 2 rounds of fence .also find the cost of rope .if it costs rs 4 per meter

Answer 1

So D =21
r=21/2
Cost rupee 4

2πr=2×22/7×21/2
Circumference=66
For twice=132
Cost=132×4=528

Answer 2

Answer:

Diameter=21m

Radius=21/2m

Circumference of circular garden=^r sq

2×22/7×21/2

=22×3

=66m

Length of rope =66×2=132m

Cost of 1m rope =₹4

Cost of 132m rope =132×4= ₹ 528

Step-by-step explanation:diameter ka half hota hai circle ha radius.phir circumference nikalne ke lia formula laga kr jo 2 multiply me hai usse jo 2 divide mai hai use cut kr dena phir 7se 21