Question

Find the cost of polishing a circular tabletop of diameter 1.8m if the rate of polishing is 12 AED per sq m

Answer 1

Answer:

Step-by-step explanation:

Area of circular table = pie r square

22/7×.9×.9

Cost=22/7×.9×.9×12

30.54 rs

Answer 2

The cost of polishing a circular tabletop is Rs 30.6.

Explanation:

Given : The diameter of the circular table  = 1.8 m

Then radius = $\dfrac{1.8}{2}=0.9\ m$  [Radius is half of diameter]

Area of circle : $\pi r^2$ , where r= radius

Area of circular table = $\dfrac{22}{7}(0.9)^2=2.54571428571\approx2.55\ sq.\ m$

Rate of polishing = Rs 12 per sq m

Then, the cost of polishing = (Rate of polishing ) x (Area of circular table)

= 12 x 2.55 = Rs 30.6

Hence, the cost of polishing a circular tabletop is Rs 30.6.

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