Question

find the cost of polishing a circular table top of diameter 4.9 metre if the rate of polishing if rupees 25 per metre​

Answer 1

Answer:

Rs. 385

Step-by-step explanation:

diameter = 4.9 m

so, radius (r) = d/2 = (4.9÷2) = 2.45 m

circumference of circle = 2πr

= 2 x 3.14 x 2.45

= 15.4 m

Cost of painting for 1 m = Rs. 25

Cost of painting 15.4 m = 15.4 x 25

= Rs. 385