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6. A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held together with tape. It is 30cm long, 25 cm wide and 25 cm high. (i)What is the area of the glass? (ii)How much of tape is needed for all the 12 edges?
17
Oct
6. A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held together with tape. It is 30cm long, 25 cm wide and 25 cm high. (i)What is the area of the glass? (ii)How much of tape is needed for all the 12 edges? 25 cm wide and 25 cm high. (i)What [...]
An infinitely long wire carrying current I is along Y-axis such that its one end is at point A(0,b) while the wire extends upto +∞. The magnitude of magnetic field strength at point (a,0) is :
17
Oct
An infinitely long wire carrying current I is along Y-axis such that its one end is at point A(0,b) while the wire extends upto +∞. The magnitude of magnetic field strength at point (a,0) is : 0) is An infinitely long wire carrying current I is along Y-axis such that its one end is at [...]
5. A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high. (i) Which box has the greater lateral surface area and by how much? (ii) Which box has the smaller total surface area and by how much?
17
Oct
5. A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high. (i) Which box has the greater lateral surface area and by how much? (ii) Which box has the smaller total surface area and by how much? 10 cm wide and 8 [...]
4. The paint in a certain container is sufficient to paint an area equal to 9.375 m^2. How many bricks of dimensions 22.5 cm×10 cm×7.5 cm can be painted out of this container?
17
Oct
4. The paint in a certain container is sufficient to paint an area equal to 9.375 m^2. How many bricks of dimensions 22.5 cm×10 cm×7.5 cm can be painted out of this container? 4. The paint in a certain container is sufficient to paint an area equal to 9.375 m^2. How many bricks of dimensions [...]
3. The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs.10 per m^2 is Rs.15000, find the height of the hall.
17
Oct
3. The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs.10 per m^2 is Rs.15000, find the height of the hall. 3. The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls [...]
A long wire bent as shown in figure carries current I. If the radius of the semicircular portion is a, the magnetic field at center C is
17
Oct
A long wire bent as shown in figure carries current I. If the radius of the semicircular portion is a, the magnetic field at center C is A long wire bent as shown in figure carries current I. If the radius of the semicircular portion is a the magnetic field at center C is October [...]
In figure, infinite conducting rings each having current i in the direction shown are placed concentrically in the same plane as shown in the figure. THe radii of rings are r, 2r, 2r^2, 2^3r, ………………., infinity. The magnetic field at the centre of rings will be
17
Oct
In figure, infinite conducting rings each having current i in the direction shown are placed concentrically in the same plane as shown in the figure. THe radii of rings are r, 2r, 2r^2, 2^3r, ………………., infinity. The magnetic field at the centre of rings will be ................... 2^3r 2r 2r^2 In figure infinite conducting rings [...]
2. The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and ceiling at the rate of Rs 7.50 per m^2.
17
Oct
2. The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and ceiling at the rate of Rs 7.50 per m^2. 2. The length 4 m and 3 m respectively. Find the cost of white washing the [...]
1. A plastic box 1.5 m long, 1.25 m wide and 65 cm deep, is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine: (i)The area of the sheet required for making the box. (ii)The cost of sheet for it, if a sheet measuring 1m2 costs Rs. 20.
17
Oct
1. A plastic box 1.5 m long, 1.25 m wide and 65 cm deep, is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine: (i)The area of the sheet required for making the box. (ii)The cost of sheet for it, if a sheet measuring 1m2 [...]
9. A field is in the shape of a trapezium whose parallel sides are 25 m and 10 m. The non-parallel sides are 14 m and 13 m. Find the area of the field.
17
Oct
9. A field is in the shape of a trapezium whose parallel sides are 25 m and 10 m. The non-parallel sides are 14 m and 13 m. Find the area of the field. 9. A field is in the shape of a trapezium whose parallel sides are 25 m and 10 m. The non-parallel [...]