Questions by uday

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Length of a side of a square and its area vary directly with each

asked Jan 17, 2022 in 8th-maths

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The area of cultivated land and the crop harvested is a case of direct

asked Jan 17, 2022 in 8th-maths

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Campus and Welfare Committee of school is planning to develop a blue shade for painting the entire school building. For this purpose various shades are tried by mixing containers of blue paint and white paint. In each of the following mixtures, decide which is a lighter shade of blue and also find the lightest blue shade among all of them. If one container has one litre paint and the building requires 105 litres for painting, how many container of each type is required to paint the building by darkest blue

asked Jan 17, 2022 in 8th-maths

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Kusum always forgets how to convert miles to kilometres and back again. However she remembers that her car’s speedometer shows both miles and kilometres. She knows that travelling 50 miles per hour is same as travelling 80 kilometres per hour. To cover a distance of 200 km, how many miles Kusum would have to

asked Jan 17, 2022 in 8th-maths

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What will be the change in the volume of a cube when its side becomes 10 times the original

asked Jan 17, 2022 in 8th-maths

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If the area of a face of a cube is 10 `cm^2`, then the total surface area of the cube is

asked Jan 17, 2022 in 8th-maths

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The volume of a cube whose edge is 3x

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The ratio of radii of two cylinders is 1: 2 and heights are in the ratio 2:3. The ratio of their volumes

asked Jan 17, 2022 in 8th-maths

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The perimeter of a rectangle becomes __________ times its original perimeter, if its length and breadth are

asked Jan 17, 2022 in 8th-maths

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Total surface area of a cylinder of radius h and height r is

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__________ of a solid is the measurement of the space occupied by

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The area of a trapezium become 4 times if its height gets

asked Jan 17, 2022 in 8th-maths

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asked Jan 17, 2022 in 8th-maths

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Radius of a cylinder is r and the height is h. Find the change in the volume if the (a) height is doubled. (b) height is doubled and the radius is halved. (c) height remains same and the radius is

asked Jan 17, 2022 in 8th-maths

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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

asked Jan 17, 2022 in 8th-maths

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A rectangular examination hall having seats for 500 candidates has to be built so as to allow 4 cubic metres of air and 0.5 square metres of floor area per candidate. If the length of hall be 25 m, find the height and breadth of the

asked Jan 17, 2022 in 8th-maths

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The given graphs show the progress of two different cyclists during a ride. For each graph, describe the rider’s progress over the period of

asked Jan 17, 2022 in 8th-maths

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Which graphs of the following represent the table below? Length of Side of a Square 1 2 3 4 5 Perimeter 4 8 12 16 20 (a) (b) (c) (d)

asked Jan 17, 2022 in 8th-maths

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The table given below shows the temperatures recorded on a day at different times. Observe the table and answer the following questions. (a) What is the temperature at 8 am?(b) At what time is the temperature

asked Jan 17, 2022 in 8th-maths

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The following graph shows the change in temperature of a block of ice when heated. Use the graph to answer the following questions: (a) For how many seconds did the ice block have no change in temperature?(b) For how long was there a change in

asked Jan 17, 2022 in 8th-maths

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