NCERT Class 8
109. External dimensions of a closed wooden box are in the ratio 5:4:3. If the cost of painting its outer surface at the rate of Rs 5 per dm^2 is Rs 11,750, find the dimensions of the box.
10
Aug
109. External dimensions of a closed wooden box are in the ratio 5:4:3. If the cost of painting its outer surface at the rate of Rs 5 per dm^2 is Rs 11,750, find the dimensions of the box. 109. External dimensions of a closed wooden box are in the ratio 5:4:3. If the cost of [...]
108. The ratio of the radius and height of a cylinder is 2:3. If its volume is 12,936 cm^3, find the total surface area of the cylinder.
10
Aug
108. The ratio of the radius and height of a cylinder is 2:3. If its volume is 12,936 cm^3, find the total surface area of the cylinder. 108. The ratio of the radius and height of a cylinder is 2:3. If its volume is 12 936 cm^3 find the total surface area of the cylinder. [...]
107. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 cm^3 of metal. Find the number of discs melted (use π = 3.14).
10
Aug
107. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 cm^3 of metal. Find the number of discs melted (use π = 3.14). 107. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 cm^3 of metal. Find the number of discs melted (use [...]
106. A housing society consisting of 5,500 people needs 100 L of water per person per day. The cylindrical supply tank is 7 m high and has a diameter 10 m. For how many days will the water in the tank last for the society?
10
Aug
106. A housing society consisting of 5,500 people needs 100 L of water per person per day. The cylindrical supply tank is 7 m high and has a diameter 10 m. For how many days will the water in the tank last for the society? 106. A housing society consisting of 5 500 people needs [...]
105. A swimming pool is 200 m by 50 m and has an average depth of 2 m. By the end of a summer day, the water level drops by 2 cm. How many cubic metres of water is lost on the day?
10
Aug
105. A swimming pool is 200 m by 50 m and has an average depth of 2 m. By the end of a summer day, the water level drops by 2 cm. How many cubic metres of water is lost on the day? 105. A swimming pool is 200 m by 50 m and has [...]
104. Below are the drawings of cross sections of two different pipes used to fill swimming pools. Figure A is a combination of 2 pipes each having a radius of 8 cm. Figure B is a pipe having a radius of 15 cm. If the force of the flow of water coming out of the pipes is the same in both the cases, which will fill the swimming pool faster?
10
Aug
104. Below are the drawings of cross sections of two different pipes used to fill swimming pools. Figure A is a combination of 2 pipes each having a radius of 8 cm. Figure B is a pipe having a radius of 15 cm. If the force of the flow of water coming out of the [...]
103. Three cubes each of side 10 cm are joined end to end. Find the surface area of the resultant figure.
10
Aug
103. Three cubes each of side 10 cm are joined end to end. Find the surface area of the resultant figure. 103. Three cubes each of side 10 cm are joined end to end. Find the surface area of the resultant figure. August 10, 2021 Category: Chapter 11 - Mensuration , Maths , NCERT Class [...]
102. A hollow garden roller of 42 cm diameter and length 152 cm is made of cast iron 2 cm thick. Find the volume of iron used in the roller.
10
Aug
102. A hollow garden roller of 42 cm diameter and length 152 cm is made of cast iron 2 cm thick. Find the volume of iron used in the roller. 102. A hollow garden roller of 42 cm diameter and length 152 cm is made of cast iron 2 cm thick. Find the volume of [...]
101. A truck carrying 7.8 m^3 concrete arrives at a job site. A platform of width 5 m and height 2 m is being contructed at the site. Find the length of the platform, constructed from the amount of concrete on the truck?
10
Aug
101. A truck carrying 7.8 m^3 concrete arrives at a job site. A platform of width 5 m and height 2 m is being contructed at the site. Find the length of the platform, constructed from the amount of concrete on the truck? 101. A truck carrying 7.8 m^3 concrete arrives at a job site. [...]
100. Find the area to be painted in the following block with a cylindrical hole. Given that length is 15 cm, width 12 cm, height 20 cm and radius of the hole 2.8 cm.
10
Aug
100. Find the area to be painted in the following block with a cylindrical hole. Given that length is 15 cm, width 12 cm, height 20 cm and radius of the hole 2.8 cm. 100. Find the area to be painted in the following block with a cylindrical hole. Given that length is 15 cm [...]