Question

find the cost of polishing a top of a circular dining table with radius 0.7m if the rate is 20 rupees per sq. m

Answer 1

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Answer 2

Here the radius of the circular table is given to be 0.7 m

We will first find out the area of the table

area of table = πr²

                     = (22/7) × 0.7 × 0.7

                     = 22 × 0.1 × 0.7

                     = 1.54 m²

Now, the rate of polishing is Rs. 20 per square meter

So, cost of polishing = 1.54 × 20

                                  = 30.8

Hence, the cost of polishing the circular dining table will be Rs. 30.8