Question

8. Find the cost of polishing a circular table-top of diameter 1.6 m,if the rate of polishing is *15/m²
(Take n = 3.14)
​

Answer 1

Answer:

ar of circular table *15/m=cost

3.14* 0.8*0.8*15

Rs 30.14

Answer 2

Answer:

• Rs 30.144 is the total cost of Polishing.

Step-by-step explanation:

Given:-

• Diameter of circular table ,d = 1.6 m

• Rate of polishing = Rs 15/m²

To Find:-

• Cost of Polishing the table

Solution:-

Firstly we calculate the area of circular table.

Radius of Circular Table = d/2

→ Radius of Table = 1.6/2 = 0.8 m

• Area of Circular Table = πr²

Where,

• π denotes 22/7 ≈ 3.14
• r denote radius

Substitute the value we get

→ Area of Circular Table = 3.14 × 0.8²

→ Area of Circular Table = 3.14 × 0.64

→ Area of Circular Table = 2.0096

Now, Calculating the Total cost of Polishing the surface of table.

→ Total cost = Area × Rate of Polishing

→ Total cost = 2.0096 × 15

→ Total Cost = Rs 30.144

• Hence, the total cost of Polishing the surface of table is Rs 30.144 .