Q81 An athelte run around the racing track of 50m find the the length covered by the athelete in one round

Q82 The playing area for the game of criket is in the form of circle of radius 63 m and the stand around it of radius 91m . Find the area alloted for the spectators

Q83 The playing area for the game of criket is in the form of circle of radius 63 m and the stand around it of radius 91m . Find the sitting arrangment if 50 people can sit in 1 sqm area

Q84 The playing area for the game of criket is in the form of circle of radius 63 m and the stand around it of radius 91m . Find the sitting arrangment if 50 people can sit in 1 sqm area. If 1 cement bag covers 0.25 sqm area find the bags of cement required .

Q85 Find the internal diameter of the ring whose thickness is 256 cm sq and perimeter of internal circle is 44 cm .

Q86 Find the external diameter of the ring whose thickness is 256 cm sq and perimeter of internal circle is 44 cm .

Q87 Find the area of external circle of the ring whose thickness is 256 cm sq and perimeter of internal circle is 44 cm .

Q88 Find the area of internal circle of the ring whose thickness is 256 cm sq and perimeter of internal circle is 44 cm .

Q89 A bike has wheel of radius 60cm find the number of turns made by the wheel to cover a distance of 5 km

Q90 A truck has wheel of radius 70cm and make 2100 revolutions find the distance covered by the truck