Question

Find the cost of polishing a circular table-top of diameter 1.6m, if the rate of polishing is Rs15/m². (take π=3.14)​

Answer 1

Answer:

Thus, the cost of polishing a circular tabletop is ₹ 30.144.

Step-by-step explanation:

Solution:

Diameter of the circular tabletop = 1.6 m

Radius of the circular tabletop = 1.6 m / 2 = 0.8 m

Area of circular tabletop = πr 2

= 3.14 × 0.8 m × 0.8 m

= 2.0096 m2

Since, the cost of 1m2 polishing = ₹ 15

The cost of polishing 2.0096 m2 = ₹ 15 × 2.0096

= ₹ 30.144

Answer 2

Step-by-step explanation:

area of circular table =πr²=3.14×0.8×0.8=2.0096

area per meter =15

so total area per meter =2.0096×15=30.144