Question

Find the cost of polishing a circular table top of diameter 1.6 cm, if the
rate of polishing is Rs. 20 per m2. ( = 3.14 )

Answer 1

Answer:

r is the radius = d ( diameter of circle) /2 = 1.6/2=0.8cm

The shape of the table is circular

So it's a circle

then,

area of circle is π rsquare

3.14× 0.8

314/100×8/10

2512/1000 cm square

so, change it into meters

2512/1000×100

251.2 m square

cost of polishing table per meter square=Rs.20

" " " " " 251.2 " " = 20×251.2

so 20×2512/10

2×2512

Rs5024.