Question

find the cost of polishing a circular table top of diameter 1.6 m if the rate of polishing is rupees 15 per metre square .pi is equal to 3.14

Answer 1

π=3.14
d=1.6m
r=0.8m
area of table top=πr²
=3.14x0.8x0.8=2.0096(approx.)
cost of polishing=15x2.0096=₹30.144
Hope this helps!

Answer 2

total cost of polishing = area of circle * rate of polishining
= 30.144 rs.