MP Board Class 9th Maths Solutions Chapter 14 Statistics Ex 14.4 Question 1. The following number of goals were scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 Find the mean, median and mode of these scores. Solution: 1. 2. Arranging the data in … Read more
MP Board Class 9th Maths Solutions Chapter 14 Statistics Ex 14.2 Question 1. The blood groups of 30 students of Class VIII are recorded as follows: A, B, O, O, AB, O, A, O, B, A, O, B, A, O, O, A, AB, O, A, A, O, O, AB, B, A, O, B, A, B, … Read more
MP Board Class 9th Maths Solutions Chapter 14 Statistics Ex 14.1 1. Give five examples of data that you can collect from your day – to – day life. 2. Classify the data in – Question 1. Above as primary or secondary data Solution: Do it yourself. Presentation of Data: The data collected in original … Read more
MP Board Class 9th Maths Solutions Chapter 15 Probability Ex 15.1 Question 1. In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary. Solution: Total number of trials = 30 Number of balls in which boundary hit = … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.8 Assume π = , unless stated otherwise. Question 1. Find the volume of a sphere whose radius is (i) 7 cm (ii) 0.63 m Solution: (i) Here, radius (r) = 7 cm ∴ Volume of the sphere Thus, the required volume … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.7 Assume π = , unless stated otherwise. Question 1. Find the volume of the right circular cone with radius 6 cm, height 7 cm radius 3.5 cm, height 12 cm. Solution: 1. Here, radius of the cone r = 6 cm … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.6 Assume = unless stated otherwise. Question 1. The circumference of the base of a cylindrical vessel is 132 cm and its height is 25 cm. How many litres of water can it hold? (1000 cm3 = 1l) Solution: Circumference of base, … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.5 Assume π = , unless stated otherwise. Question 1. A matchbox measures 4 cm x 2.5 cm. x 1.5 cm. What will be the volume of a packet containing 12 such boxes? Solution: Measures of matchbox (cuboid) is 4 cm x … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.4 Assume π = , unless stated otherwise. Question 1. Find the surface area of a sphere of radius: (i) 10.5 cm (ii) 5.6 cm (iii) 14 cm Solution: (i) Here r = 10.5 cm ∴ Surface area of the sphere = … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.3 Assume π = , unless stated otherwise. Question 1. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area. Solution: Here, diameter of the base = 10.5 cm Radius … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.2 Assume π = unless stated otherwise. Question 1. The curved surface area of a right circular cylinder of height 14 cm is 88 cm2. Find the diameter of the base of the cylinder. Solution: h = 14 cm CSA of cylinder … Read more
MP Board Class 9th Maths Solutions Chapter 13 Surface Areas and Volumes Ex 13.1 Question 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: The area of the sheet required … Read more
MP Board Class 9th Maths Solutions Chapter 12 Heron’s Formula Ex 12.2 Question 1. A park, in the shape of a quadrilateral ABCD, has ∠C = 90°, AB = 9 m, BC = 12 m, CD, = 5 m and AD = 8 m. How much area does it. occupy? Solution: In ∆DCB DB2 = … Read more
MP Board Class 9th Maths Solutions Chapter 12 Heron’s Formula Ex 12.1 Question 1. A traffic signal borard, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side ‘a’ Find the area of the signal board, using Heron’s formula. If its perimeter is 180 cm, what will be the area of the signal board? Solution: Question … Read more
MP Board Class 9th Maths Solutions Chapter 11 Constructions Ex 11.1 Question 1. Construct an angle of 90° at the initial point of a given ray and justify the construction. Solution: Draw a ray OA and with O as centre and any radius, draw an arc, cutting OA at B. With B as centre and … Read more