There are 4 circular windows in Nisha's house, each of radius 28cm are to be fitted with glass. Calculate the cost of glass at the rate of Rs. 4.25per sq. m.
Given, radius of window = 28 cm
So, area of each circular window
∴ area of 4 circular windows
Now, cost of fitting the glass per m2 = Rs 4.25
∴ cost of glass which is required to cover 0.9856 m2 of area = 0.9856 × Rs 4.25 = Rs 4.18