Chapter 11 – Mensuration
74. A boy is cycling such that the wheels of the cycle are making 140 revolutions per hour. If the diameter of the wheel is 60 cm, calculate the speed in km/h with which the boy is cycling.
10
Aug
74. A boy is cycling such that the wheels of the cycle are making 140 revolutions per hour. If the diameter of the wheel is 60 cm, calculate the speed in km/h with which the boy is cycling. 74. A boy is cycling such that the wheels of the cycle are making 140 revolutions per [...]
73. A bicycle wheel makes 500 revolutions in moving 1 km. Find the diameter of the wheel.
10
Aug
73. A bicycle wheel makes 500 revolutions in moving 1 km. Find the diameter of the wheel. 73. A bicycle wheel makes 500 revolutions in moving 1 km. Find the diameter of the wheel. August 10, 2021 Category: Chapter 11 - Mensuration , Maths , NCERT Class 8 ,
72. Find the perimeter of the given figure.
10
Aug
72. Find the perimeter of the given figure. 72. Find the perimeter of the given figure. August 10, 2021 Category: Chapter 11 - Mensuration , Maths , NCERT Class 8 ,
71. A running track has 2 semicircular ends of radius 63 m and two straight lengths. The perimeter of the track is 1000 m. Find each straight length.
10
Aug
71. A running track has 2 semicircular ends of radius 63 m and two straight lengths. The perimeter of the track is 1000 m. Find each straight length. 71. A running track has 2 semicircular ends of radius 63 m and two straight lengths. The perimeter of the track is 1000 m. Find each straight [...]
70. There is a circular pond and a footpath runs along its boundary. A person walks around it, exactly once keeping close to the edge. If his step is 66 cm long and he takes exactly 400 steps to go around the pond, find the diameter of the pond.
10
Aug
70. There is a circular pond and a footpath runs along its boundary. A person walks around it, exactly once keeping close to the edge. If his step is 66 cm long and he takes exactly 400 steps to go around the pond, find the diameter of the pond. 70. There is a circular pond [...]
69. The areas of two circles are in the ratio 49:64. Find the ratio of their circumferences.
10
Aug
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?
10
Aug
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.
10
Aug
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.
10
Aug
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.
10
Aug
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 [...]