Question Answers

78. If a and b vary inversely to each other, then find the values of p, q, r ; x, y, z and l, m, n. -q 78. If a and b vary inversely to each other m n r ; x then find the values of p y z and l August 5, 2021 [...]

77. From the following table, determine if x and y are in direct proportion or not. 77. From the following table determine if x and y are in direct proportion or not. August 5, 2021 Category: Chapter 13 - Direct and Inverse Proportions , Maths , NCERT Class 8 ,

76. A car travels a distance of 225 km in 25 litres of petrol. How many litres of petrol will be required to cover a distance of 540 kilometres by this car? 76. A car travels a distance of 225 km in 25 litres of petrol. How many litres of petrol will be required to [...]

75. If Naresh walks 250 steps to cover a distance of 200 metres, find the distance travelled in 350 steps. 75. If Naresh walks 250 steps to cover a distance of 200 metres find the distance travelled in 350 steps. August 5, 2021 Category: Chapter 13 - Direct and Inverse Proportions , Maths , NCERT [...]

74. Find the values of x and y if a and b are in inverse proportion: a. 12 x 8 b. 30 5 y 74. Find the values of x and y if a and b are in inverse proportion: a. 12 x 8 b. 30 5 y August 5, 2021 Category: Chapter 13 - [...]

73. The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g. 73. The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a [...]

72. If a deposit of Rs 2,000 earns an interest of Rs 500 in 3 years, how much interest would a deposit of Rs 36,000 earn in 3 years with the same rate of simple interest? 000 earn in 3 years with the same rate of simple interest? 000 earns an interest of Rs 500 [...]

71. It is given that l varies directly as m. (i) Write an equation which relates l and m. (ii) Find the constant of proportion (k), when l is 6 then m is 18. 71. It is given that l varies directly as m. (i) Write an equation which relates l and m. (ii) Find [...]

70. A car covers a distance in 40 minutes with an average speed of 60 km/h. What should be the average speed to cover the same distance in 25 minutes? 70. A car covers a distance in 40 minutes with an average speed of 60 km/h. What should be the average speed to cover the [...]

69. Sobi types 108 words in 6 minutes. How many words would she type in half an hour? 69. Sobi types 108 words in 6 minutes. How many words would she type in half an hour? August 5, 2021 Category: Chapter 13 - Direct and Inverse Proportions , Maths , NCERT Class 8 ,