For the following questions answer them individually
The cost of a fencing around a circular field at the rate of Rs. 45 per meter is Rs. 15,840. Then the area of the field, in square meters, is (Take $$\pi = \frac{22}{7}$$)
A wheel makes 60 revolutions in covering a distance of 990 meters. The radius of the wheel, in meters, is (Take $$\pi = \frac{22}{7}$$)
By what percentage should the radius of a sphere be increased so that the volume increases by 200%?
The length and breadth of a rectangle are 100 cms. and 60 cms. If the length increases by 5% and the breadth decreases by 4%, then, the error percentage in the area calculated from these measurements is
If in a leap year, January $$8^{th}$$ is a Sunday, the day on August $$15^{th}$$ in the same year is