Question

There is a round table of circumference 9.42m. Find the cost of polishing

its top at the rate of 18 per square meter.(Use π= 3.14)​

Answer 1

Answer:

2034.72

Step-by-step explanation:

circumference=r

r=circumference/2

r=9.42/2*3.14

=6

Area=πr^2

Area =3.14*6*6

Area= 113.043

cost=113.043*18= 2034.72 Rs.

Answer 2

Answer:

Answer is 127.17₹.

Steps below

Step-by-step explanation:

So we need to find the radius of the circle

We have been given the circumference which is 9.42m from which we can find r

C (circumference) = 2πr = 9.42

9.42 = 2 × 3.14 × r

r = 9.42 / 2 × 3.14

r=1.5m

A (area) = πr² = 3.14  × 1.5  × 1.5 = 7.065 m²

Now cost of polishing 1 m² = 18₹

∴ cost of polishing the top of table which is 7.065m² = 7.065 × 18 = 127.17₹

Hence the answer is 127.17₹