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Let the radius of the circular field = 'r' metres Then, circumference of the field = 2 X π X r = 2 X (22/7) X r Or, (44r/7) = 264 So, r = (264 X 7) ÷ 44 = 42 So, area of the field = π X r2 = (22/7) X 422 = 5544 cm2
If the radius of the base and the height of a right circular cone are increased by 10%, what is the approximate percentage increase in volume?
Due to economic surge the price of eggs suddenly reduced by 40%. This enabled a woman to buy 64 more for $30. Then the reduced price per dozen is :
A cylindrical tank has a radius of 7 meters and a height of 10 meters. Find the volume of the tank in cubic meters.