NCERT Class 8

69. The areas of two circles are in the ratio 49:64. Find the ratio of their circumferences. 69. The areas of two circles are in the ratio 49:64. Find the ratio of their circumferences. August 10, 2021 Category: Chapter 11 - Mensuration , Maths , NCERT Class 8 ,

68. Mukesh walks around a circular track of radius 14 m with a speed of 4 km/hr. If he takes 20 rounds of the track, for how long does he walk? 68. Mukesh walks around a circular track of radius 14 m with a speed of 4 km/hr. If he takes 20 rounds of the [...]

67. The area of a trapezium with equal non-parallel sides is 168 m^2. If the lengths of the parallel sides are 36 m and 20 m, find the length of the non-parallel sides. 67. The area of a trapezium with equal non-parallel sides is 168 m^2. If the lengths of the parallel sides are 36 [...]

66. Most of the sailboats have two sails, the jib and the mainsail. Assume that the sails are triangles. Find the total area of each sail of the sail boats to the nearest tenth. 66. Most of the sailboats have two sails the jib and the mainsail. Assume that the sails are triangles. Find the [...]

65. The walls and ceiling of a room are to be plastered. The length, breadth and height of the room are 4.5 m, 3 m, and 350 cm respectively. Find the cost of plastering at the rate of Rs 8 per m^2. 3 m). 65. The walls and ceiling of a room are to be [...]

64. Four horses are tethered with equal ropes at 4 corners of a square field of side 70 metres so that they just can reach one another. Find the area left ungrazed by the horses. 64. Four horses are tethered with equal ropes at 4 corners of a square field of side 70 metres so [...]

63. The circumference of the front wheel of a cart is 3 m long and that of the back wheel is 4 m long. What is the distance travelled by the cart, when the front wheel makes five more revolutions than the rear wheel? 63. The circumference of the front wheel of a cart is [...]

62. The area of a rectangular field is 48 m^2 and one of its sides is 6m. How long will a lady take to cross the field diagonally at the rate of 20 m/minute? 62. The area of a rectangular field is 48 m^2 and one of its sides is 6m. How long will a [...]

61. Ratio of area of a circle to the area of a square whose side equals radius of circle is 1 : π. 61. Ratio of area of a circle to the area of a square whose side equals radius of circle is 1 : π. August 10, 2021 Category: Chapter 11 - Mensuration , [...]

60. The surface area of a cube formed by cutting a cuboid of dimensions 2 × 1 × 1 in 2 equal parts is 2 sq. units. 60. The surface area of a cube formed by cutting a cuboid of dimensions 2 × 1 × 1 in 2 equal parts is 2 sq. units. August [...]