# Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is ₹ 15/m^{2}. (Take π = 3.14)

**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 m^{2}

Since, the cost of 1m^{2} polishing = ₹ 15

The cost of polishing 2.0096 m^{2} = ₹ 15 × 2.0096

= ₹ 30.144

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

**☛ Check: **NCERT Solutions for Class 7 Maths Chapter 11

**Video Solution:**

## Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is ₹ 15 m²

Class 7 Maths NCERT Solutions Chapter 11 Exercise 11.3 Question 8

**Summary:**

The cost of polishing a circular table-top of diameter 1.6 m is ₹ 30.14, if the rate of polishing is ₹ 15 m^{2}.

**☛ Related Questions:**

- Shazli Took A Wire Of Length 44 Cm And Bent It Into The Shape Of A Circle Find The Radius Of That Circle Also Find Its Area If The Same Wire Is Bent Into The Shape Of A Square
- From A Circular Card Sheet Of Radius 14 Cm Two Circles Of Radius 35 Cm And A Rectangle Of Length 3 Cm And Breadth 1cm Are Removed As Shown In The Adjoining Figure Find The Area
- A Circle Of Radius 2 Cm Is Cut Out From A Square Piece Of An Aluminum Sheet Of Side 6 Cm What Is The Area Of The Left Over Aluminum Sheet Take 314
- The Circumference Of A Circle Is 314 Cm Find The Radius And The Area Of The Circle Take 314

Math worksheets and

visual curriculum

visual curriculum