Questions by nikhil

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Use the Identity `(x + a) (x + b) = x^2 + (a + b) x + ab` to find the following `501 xx 502`

asked Jan 17, 2022 in 8th-maths

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Use a suitable identity to get each of the following products.

asked Jan 17, 2022 in 8th-maths

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Using identities, evaluate.

asked Jan 17, 2022 in 8th-maths

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Using `(x + a) (x + b) = x^2 + (a + b) x + ab`, find `5.1 xx 5.2`

asked Jan 17, 2022 in 8th-maths

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Using `(x + a) (x + b) = x^2 + (a + b) x + ab`, find `9.7 xx

asked Jan 17, 2022 in 8th-maths

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Draw a map of your class room using proper scale and symbols for different

asked Jan 17, 2022 in 8th-maths

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Draw a map giving instructions to your friend so that she reaches your house without any

asked Jan 17, 2022 in 8th-maths

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Mohan wants to buy a trapezium shaped field. Its side along the river is parallel to and twice the side along the road. If the area of this field is 10500 `m^2` and the perpendicular distance between the two parallel sides is 100 m, find the length of the side along the

asked Jan 17, 2022 in 8th-maths

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In a building there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. Find the total cost of painting the curved surface area of all pillars at the rate of Rs 8 per

asked Jan 17, 2022 in 8th-maths

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Find the height of a cylinder whose radius is 7 cm and the total surface area is 968

asked Jan 17, 2022 in 8th-maths

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Daniel is painting the walls and ceiling of a cuboidal hall with length, breadth and height of 15 m, 10 m and 7 m respectively. From each can of paint 100 `m^2` of area is painted. How many cans of paint will she need to paint the

asked Jan 17, 2022 in 8th-maths

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A road roller takes 750 complete revolutions to move once over to level a road. Find the area of the road if the diameter of a road roller is 84 cm and length is 1

asked Jan 17, 2022 in 8th-maths

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Find the height of a cuboid whose volume is 275 `cm^3` and base area is 25 `cm^2`

asked Jan 17, 2022 in 8th-maths

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Evaluate. `3^(–2)`

asked Jan 17, 2022 in 8th-maths

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Express the following numbers in usual form. `4.5 xx

asked Jan 17, 2022 in 8th-maths

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A train is moving at a uniform speed of 75 km/hour. Find the time required to cover a distance of 250

asked Jan 17, 2022 in 8th-maths

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In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model

asked Jan 17, 2022 in 8th-maths

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A 5 m 60 cm high vertical pole casts a shadow 3 m 20 cm long. Find at the same time the height of a pole which casts a shadow 5m

asked Jan 17, 2022 in 8th-maths

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If a box of sweets is divided among 24 children, they will get 5 sweets each. How many would each get, if the number of the children is reduced by

asked Jan 17, 2022 in 8th-maths

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A factory requires 42 machines to produce a given number of articles in 63 days. How many machines would be required to produce the same number of articles in 54

asked Jan 17, 2022 in 8th-maths

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