Question

Find the cost of polishing a circular table top of diameter 1.4m if the rate of polishing is 40₹/sq m.​

Answer 1

Answer:

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

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

Answer 2

Answer:

Rs 30.14 (approx.)

Step-by-step explanation:

Diameter of the circular table top = 1.6 m

Radius of the circular table top =1.6/2 =0.8

Area of circular table top = π r

= 3.14 x 0.8 x 0.8 = 2.0096 m2

Now cost of 1 m2 polishing = Rs 15

Then cost of 2.0096 m2 polishing = 15 x 2.0096 = Rs 30.14 (approx.) Thus, the cost of polishing a circular table top is Rs 30.14 (approx.)

Hope this helps  you mate :))