Question

9. The diameter of a circular table is 80 cm, find the circumference. Also, find the cost of covering the
boundary with a ribbon at the rate of Rs. 8 per cm. Take n= 22/7 (hint: C= 21R)​

Answer 1

Step-by-step explanation:

diameter is 80 so radius is 40

circumference is equal to 2πr

21r is 21*r

21*40

840cm^2 is circumference

rate is 8 per cm

= 840*8

= ₹6720 cm^2

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Answer 2

Answer:

Sorry friend I did'nt Know this answer