21) Find the circumference of a circle, whose area is 24.64 meter sqa
22) The wheel of a motorcycle, 70 cm in diameter makes 40 revolutions in every 10 seconds. What is the speed of the motorcycle in km
23) If the radius of a circle is diminished by 10%, then the area is diminished
24) One side of rectangular field is 15 meter and one of its diagonals is 17 meter. Then find the area of the fiel
25) The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) i
26) The percentage increase in the area of a rectangle, if each of its sides is increased by 20% i
27) The area of a rectangle is 460 square metres. If the length is 15% more than the breadth, what is the breadth of the rectangular field
28) A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered.If the area of the field is 680 sq.ft, how many feet of fencing will be required
29) The perimeters of two squares are 40 cm and 32 cm. Find the perimeter of a third square whose area is equal to the difference of the areas of the two squares
30) The Diagonals of two squares are in the ratio of 2:5. find the ratio of their area
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