Sujeet Kumar

Chapter 12 Equations in One Variable 12.2 Question 3.The ratio of the weights of copper and zinc in brass is 13:7. Find the weight of zinc in a brass utensil weighing 700 gm.Solution:Let the weight of zinc in the brass utensil be x gm.Since, the ratio of the weights of copper to zinc in brass … Read more

Question 1. Each equation is followed by the values of the variable. Decide whether these values are the solutions of that equation.i. x – 4 = 3, x = – 1, 7, – 7ii. 9m = 81, m = 3, 9, -3iii. 2a + 4 = 0, a = 2, – 2, 1iv. 3 – … Read more

Question 1.Show the following information by a percentage bar graph. Division of standard 8 A B C D Number of students securing grade A 45 33 10 15 Total number of students 60 55 40 75 Solution: Division of standard 8 A B C D Number of students securing grade A 45 33 10 15 … Read more

Chapter 11 Statistics Set 11.2 Question 1.Observe the following graph and answer the questions. i. State the type of the graph.ii. How much is the savings of Vaishali in the month of April?iii. How much is the total of savings of Saroj in the months March and April?iv. How much more is the total savings … Read more

Chapter 11 Statistics Set 11.1 Question 1.The following table shows the number of saplings planted by 30 students. Fill in the boxes and find the average number of saplings planted by each student. No. of saplings (Scores) xi No. of students (frequency) fi fi × xi 1 4 4 2 6 __ 3 12 __ 4 … Read more

Division of Polynomials Class 8 Practice Set 10.2 Question 1. Divide and write the quotient and the remainder.i. (y2 + 10y + 24) ÷ (y + 4)ii. (p2 + 7p – 5) ÷ (p + 3)iii. (3x + 2×2 + 4×3) ÷ (x – 4)iv. (2m3 + m2 + m + 9) ÷ (2m – 1)v. (3x – 3×2 – 12 … Read more

Question 1.Divide and write the quotient and the remainder.i. 21m² ÷ 7mii. 40a³ ÷ (-10a)iii. (- 48p4) ÷ (- 9p2)iv. 40m5 ÷ 30m3v. (5×3 – 3×2) ÷ x²vi. (8p3 – 4p2) ÷ 2p2vii. (2y3 + 4y2 + 3 ) ÷ 2y2viii. (21×4 – 14×2 + 7x) ÷ 7x3ix. (6×5 – 4×4 + 8×3 + 2×2) ÷ 2x2x. (25m4 – 15m3 + 10m + 8) ÷ 5m3Solution:i. 21m² … Read more

Question 1.John sold books worth Rs 4500 for a publisher. For this he received 15% commission. Complete the following activity to find the total commission John obtained.Solution:Selling price of the books = Rs 4500Rate of commission = 15%Commission obtained = 15% of selling price = 15 × 45∴ Commission obtained = 675 Rupees.∴ The total … Read more

Question 1. If marked price = Rs 1700, selling price = Rs 1540, then find the discount.Solution:Here, Marked price = Rs 1700,selling price = Rs 1540Selling price = Marked price – Discount∴ 1540 = 1700 – Discount∴ Discount = 1700 – 1540= Rs 160∴ The amount of discount is Rs 160. Question 2. If marked … Read more

Question 1.Measures of opposite angles of a parallelogram are (3x – 2)° and (50 – x)°. Find the measure of its each angle.Solution:Let ₹PQRS be the parallelogram.m∠Q = (3x – 2)° and m∠S = (50 – x)° m∠Q = m∠S…..(i)[Opposite angles of a parallelogram are congruent]∴ 3x – 2 = 50 – x∴ 3x + … Read more